How much should i expect to have to pay to have this unit installed in my G? We have a car toys here.... anyone know a good place in houston where i should get it? Im thinking im gonna get it for xmas this year

2004 Black on Black g coupe 6spd.... aluminum pedals, clear corners, z tube, and pop charger. soon to have 19" volk gt-c's and PIAA xtreme whites in the clearance and corners
Houston Texas