Been there, done that, oak and hickory.
I don't think I could stand that much chainsaw roar, but hiring a portable bandmill is fast and the work is not too hard. Get your logs yarded right by where the mill will sit and have a plan for transport to the kiln, which you really must do to keep the floor tight. I got mi hardwood for about $1/SF, including drying and having it dimensioned in a mill. It's a lot of hauling and loading, so you really have to want to do it. If you want rustic floors, of course, you can square and plane with lots less work than tongue and groove. The pro mill can do all four sides and the T&G in one pass, though, so it makes sense to go for the finished look and be done with it. Most of my milling was charged by the linear foot, so it paid me to use wide boards. My widest are 8". Wide means lots of cupping though, so you have to plan to deal with that. Then you'll lay it (need the nailer thingy), sand it, and varnish, and sand, and varnish, etc. If you are careful, you can get a $7-8/SF floor for about $1.50/sf.