Something like this would be decent if you wanted to keep it on the floor: https://www.amazon.com/Desktop-Computer-Rolling-Adjustable-Universal/dp/B07R7Z5T6K/
I use something like this, there are many solutions - Universal PC Computer Holder Cart with 4 Caster Wheels (Black) https://www.amazon.com/dp/B07R7Z5T6K/ref=cm_sw_r_cp_api_glc_fabc_C.q1FbRDBQNXX