I have a total of roughly $36-38,000+ in to mine, but it was pretty rough to start (see my pic link) and spent well over 10k on the body metalwork alone to have it done professionally (welding n all) I was getting hosed so brought it home right after that and completed the bodywork myself.

I call it my "rolling RRSP" or in the US I suppose a "rolling 401K"...more fun too....