...not to try and appear discouraging, but bumping the thread repeatedly when you've been given answers might pî$s a few people off...
Most of the stuff you listed originally as being stuff that you'd like to DIY will either cost more to DIY than to build, or will probably sound worse than the real thing. -Also, the resale value of a home-made box will be close to zero, bear all that in mind.
PRR makes great points, but I can't help thinking that you're possibly still labouring under the illusion that you can make most of the high-dollar, high-performing stuff that's out there in the marketplace, cheaper than you can buy it... With a few exceptions, you basically can't.
The SSL compressor is an example of one that you basically can, but it doesn't behave like the real compressor... switch a tone from one channel to both channels and you'll see the gain reduction increase... that doesn't happen on the original, and means that the DIY version is more aggressive in attacking mono elements of a mix... It's still a good compressor, but build it, enjoy it and move on. Don't think that you have a real SSL compressor.
Go to the black market, choose from the "menu", buy whatever you see that you would like to try and build, (I suggest starting with something moderately easy like the SSL-style compressor) and start becoming familiar with DIY electronics that way. When things start to be more familiar, you'll be more acclimated to the whole madness.
I've seen lots of people enthused in pretty much the same manner as yourself, and many of them bite off more than they can chew, lose interest and sell off half-finished projects... -Pick one, complete it, enjoy it, move on to the next one, that's my advice.
As far as building circuit boards yourself, you certainly can, but be ready for a lot of failures. -If you're new to it, I suggest that you just buy the boards... it might stave off discouragement!
Keith