Hrmm.. wow. Where do I begin?
I could enter the flame war - but I guess i'll offer advice...?
Look maybe on craigslist or somewhere for someone that does tint jobs out of their garage / side job. Taking it to a shop I got quoted from 175-225$ from many places.. Found a guy on craigslist that used quality film and had references to do it for ~100$.. he was awesome, professional, etc. Did a fantastic job I threw him a $50 tip.
People do it as side jobs so they dont have to pay shop fees.