It's pretty easy. If you don't have a saw, you can get wood cut @ Home Depot or Lowe's, buy a cheap screw gun and a box of screws. Search stand builds on RC or R2R and go from there. Any questions, PM me or start a thread about stand building. There's plenty of great people here that will gladly help.
Started gluing some plumbing, need to take a break as the fumes are unbearable even with windows and fans on. Don't ever remember the usual purple primer smelling as strongly as the clear. Oh well, live and learn.
Small update with some 2 x 6's I had laying around in the garage. I built this saltwater mixing station the other day with my Dad and daughter. I know it's overkill, but it was free wood to me. I'm going to take the BRS RO/Di unit out from under sink and mount it to the vertical board. If I didn't have 1 barrel filled with saltwater and rock, I'd start on plumbing up the mixing barrels.
Couple of completed pics. Installed a drain into the waste pipe under the sink, put a ball valve on the supply line under the sink as well. Installed an RO Flush valve on top[ of the RO/DI unit. Don't mind the antique wall phone, lol. Not my house.