My wife didn't think it was a good idea at first, but it didn't cost that much to buy the MB diesel. It was the next year of parts purchases that was touch and go for me.
After she saw the end result, she ended up wanting one for herself. I love my wife and we both love our diesels.
EDIT: She actually let me sell our 1998 Acura CL, 2003 Acura TLS and a 1999 Chevy Blazer to get our diesels. Oh yeah, I sold my 1998 Suzuki Marauder too.