This is a really great resource, but just wanted to add my 2c. I've had (or at least used) most of the variations on this list, and if I could do it again, I'd probably just further down the list faster. I'm a programmer by trade so I spend a lot of my time typing, and I can't express how much of a positive impact building a dactyl manuform has had on my wrists (and just general typing comfort). If you have a 3D printer already it's actually pretty easy to put everything together, and you could probably definitely do it all yourself under your budget (so long as you already have the soldering equipment). The kits are definitely going to run you more though. That said, in my opinion, its worth going at least to columnar stagger if you're going to go down this route! (Plus - if you're already relearning to type, do yourself a favour and switch from qwerty to dvorak or colemak or something like that!)