My experience with FI has not been to harsh financially. My first rebuild in last May did a 144 BM, purchased $800 off craigslist. Bearings and gasket kit $175. Rebuilt it, sold it, and installed in 1 weekend. Freinds camaro became a terror. When we did the blower cam he lost alot of low and mid boost due to cam overlap. Careful with that. Freind was disapointed with 2nd result.
In last July after getting bit by the roots bug, I did my 85 C10 . It was pretty expensive $2000. The same results , an absolute terror with no cost to driveability.
Last month I got a Jacksonracing supercharger for my integra for $1000. The whole kit. Still need a couple small things. My expectations are high. Like 14 sec 1/4 and 190-200 whp.
The only supercharge project that was over a grand was the Edebrock on my truck. Because it was brand new. You dont have to spend a fortune.
10k , yikes , Not many people could do that...and enjoy it.