How much of the work are you willing to do yourself?
For paint, hit the local NAPA parts store. It's been a while but they used to carry "Fleet paint", from $30-$40 a gallon. High gloss
fast dry enamel. Fast as in you shoot it, put the paint gun down & it's dry to the touch (no pressure). Take a little time & get nice results for around $100.
Since it's a '94, I'll presume it's not OBD II computer. Of course I won't say you could replace the catalytic converter w/ a straight pipe as that would be illegal but if you did, it won't affect your computer (No downstream o2 sensor). Redneck engineering would be taking the single exhaust from a small v8 (or v6 if you have a 4-CYL) & graft it on just past your head
(or "Y") pipe. Could probably get that on the cheap at the junkyard.