For reference on pricing:

A very basic 5 port switch with 2.5Gbit ports - $90:

https://www.amazon.com/5-Port-Multi-Gigabit-Unmanaged-Entertainment-Network/dp/B0995S28PQ

A 16 port gigabit switch - $50:

https://www.amazon.com/Tenda-Unmanaged-Wall-Mount-Optimization-Protection/dp/B09F2T3PQ2/

A 4 port gigabit switch - $15:

https://www.amazon.com/Ethernet-Splitter-Optimization-Unmanaged-TL-SG105/dp/B00A128S24/

A *48* port gigabit switch - $100 - only slightly more than the FIVE port 2.5Gbit 5 port:

https://www.amazon.com/MokerLink-48-Gigabit-Rackmount-Unmanaged/dp/B0C53LCY65/

An eight port 2.5GBit switch - $130 - MORE than the 48 port gigabit switch, but with 1/8th the ports:

https://www.amazon.com/TRENDnet-2-5GBASE-T-Compatible-10-100-1000Mbps-TEG-S380/dp/B08XWKF55C/

You dont need a switch that has 2.5 GbE ports for devices that only have a 10/100 Mbps ports.

You can use a switch like this instead.

8 port hub

https://www.amazon.com/Ethernet-Splitter-Optimization-Unmanaged-TL-SG105/dp/B00A128S24/ref=pd_bxgy_147_img_2/134-3682184-5174748?_encoding=UTF8&pd_rd_i=B00A128S24&pd_rd_r=6c65d5cd-b15b-4506-ba2e-9e89997b25b5&pd_rd_w=m4EBN&pd_rd_wg=x06Iv&pf_rd_p=09627863-9889-4290-b90a-5e9f86682449&pf_rd_r=5JDYPCGT7S461N725EKK&psc=1&refRID=5JDYPCGT7S461N725EKK

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this ok?

im connecting my pc, rasberry pi4, lutra caseta hub. thats it.

You are going to to need the Starlink ethernet adapter pretty much no matter what you do.

Ideally:

1. Run ethernet cable from starlink to a switch inside the house
2. Run ethernet cable from the switch in the house to an Access Point (AP) in the house
3. Run an ethernet cable from the switch in the house to an access point in the workshop.

Alternatively

1. Run ethernet from starlink to a point to point wireless bridge in the out building
2. The other side of the wireless bridge will be mounted on the house.
3. Run ethernet from the wireless bridge on the house to a switch in the house
4. Run ethernet cable from the switch in the house to an Access Point (AP) in the house
5. Run ethernet cable from the switch in the house to an Access Point (AP) in the workshop

Edit:

Switch: https://www.amazon.com/Ethernet-Splitter-Optimization-Unmanaged-TL-SG105/dp/B00A128S24/

Wireless bridge:https://www.amazon.com/NanoBeam-NBE-5AC-Gen2-US-airMAX-Dedicated-Management/dp/B07NNWY9Y8

Access Point: https://www.amazon.com/TP-Link-EAP225-V3-Wireless-Supports/dp/B0781YXFBT/

For only $12 more and then you can jump to an 8-port too for future expansion, still under $30.

So the laptop has 1 HDMI and USB C. should i get the 2x2 HDMI switch?

You could do that, or depending on the laptop's USB-C configuration, a USB-C to display port cable would work fine.

The displayport one supports higher bandwidth communication though - you probably cant do 1440p144hz over the hdmi model.

i don't see an ethernet port on this switch. will it use the wired ethernet from the desktop when laptop is plugged in? sorry if dumb question

Does your laptop have an ethernet port? If it does, you don't need to put your ethernet on a KVM for your use case. You can just buy a cheap ethernet switch to split your desktop/laptop: https://www.amazon.com/Ethernet-Splitter-Optimization-Unmanaged-TL-SG105/dp/B00A128S24/

Ok, it's actually just a 5 port switch: https://www.amazon.com/gp/product/B00A128S24/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

From Modem --> Eero -Gateway -> Swtich -> (very few devices). Also included in my topology are 2 other Eero Pro 6Es acting as access points.

95% of my network is wireless.

You could always bring an unmanaged ethernet switch with you to use with the router. https://www.amazon.com/Ethernet-Splitter-Optimization-Unmanaged-TL-SG105/dp/B00A128S24/ref=sr\_1\_1\_sspa?crid=32IZPGVQW6M4L&keywords=5+port+ethernet+switch&qid=1683822627&sprefix=5+port+ethernet+switch+%2Caps%2C86&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzM0dVS1gwQ00zN1oxJmVuY3J5cHRlZElkPUEwNDk1MjQwM0RVVzExTFAwSERDRCZlbmNyeXB0ZWRBZElkPUEwMjc2NzA3ODlPVUg0OUUyU0xTJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

Yes, through the Raspberry Pi and RaSCSI. My current setup. Please don't mind the HDD just hanging out, my external enclosure is on its way. The cable on the left is the DB 25 cable that connects to my PM 7500/100 (external SCSI DB 25). One big advantage of using the RPi is I created a WiFi bridge, sharing its internet over the Ethernet port.

(Edit) the device underneath the RPi is a TP-Link 5 port switch . I just realized the angle I took the picture sucks.

I am not sure how exactly this splitter is supposed to work, but if it works how I think it does based on the wiring diagram sticker, this splitter will only work if you have gigabit ethernet as anything slower than that doesn't use pins 4, 5, 7 & 8 which is what the left jack is connected to based on that wiring diagram.

I think the way you are supposed to use this splitter is by having two, one on both ends (so one at the router and one where your PCs are) and connect it like this

If that is inconvenient or not possible I suggest getting a small switch like this one and use that instead

I am using Ubiquiti Airmax PowerBeam units for a similar situation. What I did was plug the main unit into my network and at the second location I have a switch with two units. One is synced with the main unit and the other faces the third location where I have another switch and a forth unit. I couldn't get PtMP so I went this route and it works great! They are weather proof so they can be mounted outside. I suggest the Ubiquiti NanoStation Loco M5 and 2 TP-Link 5 port switches.

NanoStation - you will need 4

Switch - you will need 2