I just got back from running my "sporstman" shafty through most of the courses that we ran last weekend at Lakeview (chalk marks are still visible). It did very well. Couldn't turn for chit, and I had to be careful about not getting it bound up for fear of twisting the driveshafts off, but I was pleasantly suprised.
Stock chassis plates, homemade skid and links, mismatched shocks w/mismatched & unknown oil weights, stock axles, stock servo, and a 35t motor/Sidewinder. Otherwise, no aftermarket parts.
First run was with the short Badlands. Ran course 2, 3, and 4. The only real trouble I had was making the tight turns and sidehilling (which was a bitch anyway). Got the axles high centered a few times, but nothing I couldn't overcome.
Second run was with the tall Rovers. Same courses, slight height and sidehill traction advantage, but otherwise the same.
Third run was with my regular comp rig, minus dig. The only real noticable differences were between suspension setups and power. There were even some spots where the cheapy rig drove better. Its made me rethink my suspension setup on the comp rig.
I really enjoyed driving the cheapy. It did well, and I wasn't worrying about what was going to break when it fell. Even the stock Axial servo wasn't much of a hinderance. It just has to be driven a little differently.
I still say keep the costs down and make this class focused on driving and tuning.