Do you have a decent video/photography tripod? If yes, you can buy a small tray from Amazon for your tripod for about $20. https://www.amazon.com/Projector-Mountable-Projectors-Equipment-Amplifiers/dp/B07L7BLJXN

Also if you can find this ikea laptop table used (it’s discontinued) but it will do the trick: https://www.ikeaddict.com/ikeapedia/en/Product/40242766/ca-en/svartasen-laptop-stand-white/Entry/