Just to support what Cassave said, I've built 2 frames now in my basement. All frame facing/chasing/reaming gets done by a local shop. Cost of entry is so high on those tools, you'd have to plan to make at least 15 frames probably before you'd approach covering the costs of having a shop do the work. I say build a few, if the bug bites you, you can always start slowly accumulating those tools over time. I haven't built my own fork yet, but am about to and you can do straight legged forks with angled crown to avoid the need for a bender. I own no alignment tools aside from a straight edge, angle finder, some string, and a good eye, and both my bikes pass all string alignment tests and can be ridden no-handed.

Watch some brazing videos on youtube, pick yourself up a book, read a ton of the various frame forums, do some practicing, and you can silver braze yourself a bike too. It's fun and rewarding.

It's not like wheel building, in that it's not really very easy. You'll make mistakes, you'll have to pull tubes apart and re-braze them, you'll miter both ends of a tube before you realize that you totally flipped one of the miters upside down (ask me how I know). But with time, patience, and a measure 5 times, cut once attitude, it can be done.