im 20 i make 9 bucks an hour.. ive had my car for almost 4 months, maken payments on it i put 1800 down.. i had it for a month before i did anything and the mods go in this order

cd head unit
amp and sub install
exhaust
cai
and strut bars front and rear

id say ive put maybe 450 into my 91 ls but more likely between 350 and 400..ebay and if you can find a good deal on a good item pawn shops man thats where i got my amp and sub from is a wonderful thing...