All you need is a desk to work on. If you are doing small projects any one of those art desks you can find at cheap art stores will do.
I use a professional art desk from a ad company that closed down years ago. Just made a tent around it and added lights to it. I prob spent $15 at home depot for tubes, and then like $20 for shower curtains to close it in.
So i have my desk for sculpting and painting on, then my desk for air brushing. Space is small and works for my apartment. I just do sand work and priming at my parents garage on weekends.
here is a old pic of my set up.