There are guides to make portable PVC ones that are pretty sturdy, almost built one myself. You don't need all the suspension gizmos. Wheel, monitors, and everything 1-2k depending on what quality you get. Thats if you have nothing. Already have a g27 wheel and computer. You can also build the stand, and add it in later. PVC stand is light, sturdy, and can be dismantled for storage or whatever. Cost is around $100 bucks I think.
http://www.isrtv.com/forums/topic/681-simul8r-mark-ii-pvc-plans-bottom-of-pg-7-donations-accepted/
You can make your own design of course.
http://www.isrtv.com/forums/topic/681-simul8r-mark-ii-pvc-plans-bottom-of-pg-7-donations-accepted/
You can make your own design of course.