If you don't have the cash now wait and get the thing done right and you will be happy with the results. I have spent THOUSANDS trying to save a buck only to have disappointment and a handful of below par passes before problems surface only to spend thousands again having things tweaked (again). The treadmill nightmare never ends. I spent $$ one time with Dan at DLS and it was the best $$ I ever spent and I have more passes at BIG power levels for less $$ I spent with all the run arounds before him.
DLS, RPE, Zimmerman, Anderson have cars out running at every event. I would call all of them and make a choice from there.
Just a bit of advice.
AMEN!!!! You will save by doing it right the first time! Just look at our Race Car project in my sig... Instead of trying to "fix" the old, it was cheaper to just "start over!"