You'd be better off cutting the poles yourself so you can strip the bark off straight away with a scraper. You'll also need a drawknife and shaving horse.
When I did this (in 2006, so memory could play tricks), we'd cut a dozen or so poles each and carry them back to the outside workshop. Then strip them, then shape the roofwheel end into a square and take wood off both sides of the other end for about 2.5 feet so it will bend without splitting. Then they were put in a homemade steamer and left for a few hours, removed and left to set on a former for a few days, before sanding and oiling.
The trellis in front of me is 1 inch stripped. The roof poles are 1.5. If you can find someone near you making yurts, I'd go along and meet them. Maybe help out. Maybe you can use some of their gear. If not, there's a good chance they'll be really good people. Working on your own, the frame could take you a couple of months. Then there's the roofwheel making to sort and the cover. Your budget won't stretch to much so maybe you should look at used fabric from marquee people. Or a yurt camp that's giving it up.
You might even find a whole yurt and cover for the money you have, which would save you all this. But you wouldn't meet so many people. Don't forget your flooring joists, floorboards, stove, pipe etc etc. Again you could barter your time for this. If you have a Transition Network project near you, get in touch with them, too. They'll have a network of people who will be happy to help out.
Once you're in your yurt, you won't stop dreaming. One day, I'll have a strawbale house. Mainly for the
. I'm burning far too much wood for
in the winter.
Good luck from me.