I have not read every post in the thread in detail, hopfully no one has mentioned this already. I have something to think about NOT doing. Please consider not having a dedicated finishing room. I have one that never got completely finished. That's right, an unfinished finishing room. By unfinished, I mean no cabinets or tables and no ventilation system. This room has turned into a big storage room. I now do my finishing in a open area in the middle of the main shop which works out ok for me. Honestly, even if it had gotten finished, I think it would still have ended up being a storage room.
For the hobbiest (me) finishing really takes up very little time in the building of a project. I know for me, I will spend maybe 2 or 3 days finishing a project that has taken me several months to build. Plus, I am not generating new dust while the finishing process is going on, like in a pro shop. Having an area in the shop that is used for finishing, but can also be used for assembly or other activities would be a better use of that valuable shop floor space.
Just my 2 cents worth.
Larry J Browning
There are 10 kinds of people in this world; Those who understand binary and those who don't.