Arrow Frame and Alignment does a really good job with modified vehicles that need aligned. Probably not the cheapest deal in town but they will make sure it's right. They're almost arguably too picky with the perfection sometimes. As far as tires go... No clue, I've been mounting my own or hitting the local mexican tire shops typically for that stuff.
Yeah, that's INSANELY high! I bet arrow does your aligment for $75-100 and discount or any tire shop should do your tires for probably about the same price. I think the mexican tire shops charge $15 per tire for mount and balance usually. Or at least the one on trop and maryland does for me. Then again, I'm in there so often they may consider me a regular and give me a price break now for all I know. LOL