Yes, it always boils down to
Yes, it always boils down to this; do you want to spend the money now or later? Although Aaron makes a good point that no banks would lend you money for a conversion, I know I'm not the only one who doesn't want to owe money.
Conversion take a long time, sometime over a year, depending on the level of preparation needed. It's much like the restoration of an old classic.
It makes a lot of sense if you have the time and the money and if you do the math first, you will savw money in the long run. I think they are the best around town cars. You get to choose the car you love and then run for pennies on the mile.