I would consider my car a budget build, but I haven't put any hackjob parts on it. Just going slow.
1226/2000: $4000 (included some freebies, exhaust, wheels, extra unassembled engine)
evo 8 wheels, new tires: $900
Parts and work on spare motor: $1100
Maintenance items(wheel bearings, 5 lug swap, cooling system overhaul, timing overhaul, plugs, wires, misc extras): $1200
Odyssey battery: $110
Intercooler setup: $500
16g turbo, evo iii manifold, associated new parts and hardware: $400
Misc crap: $200
So I'm into my car around $8000 total.