All you really need is a flat board, ride height gage, tweak station, and camber gage. The rest is all to make life easier. The huge set-up stations are nice to get toe set-up or to try to trouble-shoot bent parts. However, the rest can usually be done with the simple tools mentioned earlier. I have the Integy station, and have also used the Hudy in the past. After initial set-up, they collect dust.
If you really need a droop set-up, then I guess you should invest in that. Most of the set-up sheets now are listing droop over ride height, so all you'd need in that case is just the ride height gage.
Speed Merchant Rev7, Tekin, TQ Racing (wire), Team Tamale
RC Excitement - Buy where you race, support your local tracks.