I did it myself. Down in the crawl space, drilled up through the sill plates, strung CL2 speaker wire & coax up into the walls and put in wall plates with binding posts and RCA jack for a subwoofer run (monoprice). One afternoon and part of an evening.I don't know anybody who has paid to have it done, either you want it bad enough that you do it yourself...
How do I find some poor schmo who wants to make some money on the side?