If you want boxes for all of them, the most efficient options for 100 sleeved cards are here:

Single boxes https://www.fantasyflightgames.com/en/search/?q=Deck+box+100+cards

https://www.fantasyflightgames.com/en/products/fantasy-flight-supply/products/deck-box-black/

These also include detachable dice compartments if you want to include a couple of D20s and D6s for life and counters.

Or

Dual boxes

Pro Tower Deck Box, Black https://www.amazon.com/dp/B00DHQSG6O/ref=cm_sw_r_cp_api_PDqgAbM6J9FN4

These hold 2 decks, and come with an extra slot that holds 10ish sleeved cards, or any die smaller than a standard D20.

I picked up one of these, and really like it!

I can fit 2 decks in it, one in each tray, then where the "oversized" cards are supposed to go, I put two top loaders which hold each commander. I keep the rest of my decks in fat pack boxes... but I am looking to either get more of the tower boxes, or find another solution for bulk decks.

I keep my dice in a Canon lens bag like this They make great dice bags, and dont cost anything if you buy a fancy lens first!

I usually carry everything in my camera backpack it works great to have a backpack that is already designed to hold heavy junk. (plus, I can bring my camera too)