I thought of getting a smaller knee mill. It takes up about the same footprint as an RF. They come up from time to time on CL, but it usually seems to be resellers, not individuals, so the prices are on the higher side. They are so heavy you need to hire a rigger/machine mover to pick up and deliver them. I think I heard that's about $500 or so. They tend to sit for awhile, which I suppose is a good thing; I could offer less to pay for moving it. But, I think they know what they have and that it will take awhile.
I could probably rent a trailer and maybe a winch and use a crow bar to lift the mill enough to get blocks under it to be able to get pipes under it to roll it into the trailer. That's risky, and I'm not strong enough. So, a mill I can left by hand or with an engine hoist it will have to be.
Knee mills have no storage space under them, either. Another advantage of a smaller, bench top mill.