You might also want to consider a spray booth. I used a respirator for a while and then installed a booth. Darned glad I did because now I can shoot without a respirator or having a fog of finish floating around the shop.
You'll need a good air compressor large enough to run a good blasting cabinet, 120 Alox media for blasting, soak tanks for degreasing, brake cleaner (for degreasing), masking supplies, measuring and mixing beakers, stir sticks, strainer, decent HLVP gun with .8 tip (the HF guns work okay but plan on replacing them from time to time), Acetone for cleaning the gun and beakers, an oven big enough to hold barrels and capable for maintaining a constant 250 degrees for 2 hours, hooks for hanging parts in the oven, stencils if doing camo patterns, and a bit of patience.
I've been shooting Cerakote for a while and have quite a bit invested in equipment. Yes, you can do it on the cheap but you'll end up fighting a few things (like fog in the shop if you don't exhaust the spray area).