I'm six months into full time, and the lights haven't gone off yet. It's do-able because I don't have a family, work from home with fairly low rent, and can usually dig up fall-back work if things get slow.
I mostly wanted to answer the part of your question about equipment and getting started. I'm convinced that a big part of being a good craftsman is figuring out how to work with what is available. I made way more knives than most would tolerate on a 1x30, then built my own 2x72 for less than $500. I have a small chinese drill press ($0), a 4x36 ($150), and a harbor freight angle grinder ($0). Those 4 tools do the bulk of the work, and I can output roughly one finished knife a day. Would two KMGs, a surface grinder, a horizontal belt grinder, etc be nice? Sure, but that is many thousand dollars, and I'm not convinced my final product would be any different.
So my advice would be to not go into debt to get set up, you can do a a lot with a little. The product has far more to do with the maker than the equipment. I wouldn't worry about trying to sell you early knives, they might be worth a few bucks to someone, but I think your time is better spent working in your shop than trying to make sales. Test the crap out of your early stuff, put it in the dishwasher, leave it outside for a week, baton wood with it, etc and find out your weak points so you don't do a bunch of warranty work later. When you run out of family members to give fits to, start trying to sell. Just my two cents, enjoy and good luck!