No, they're not too bad to pull. The first thing you need to round up is a drive clutch puller. Check mfgsupply or Dennis Kirk, or maybe on eBay for the best price.
Once you get the drive clutch off, the motor comes out pretty easily.
The motors on these were assembled in Japan, so everything on the motor is metric, so metric wrenches, or sockets, and Allen wrenches.
The next pain will be removing the flywheel. If you don't have any kind of puller, maybe a local shop or motorsports dealer would remove it for cheap.
Most everything from there on is pretty straightforward.
One more thing to buy, borrow, or whatever, is a torque wrench. You don't need a fancy, expensive digital one. I have used the old beam type torque wrench forever.
While I have put lots of stuff together over the years just cranking down "that feels tight enough"...a motor that's gonna spin to 8000 RPM is a lot more important to torque down correctly.
I know you're on a budget, so perhaps a neighbor, co-worker might have one you could borrow when you're ready to put the motor back together.
Just think how much fun if you get the old girl back together and running great, and we get LOTTSA snow next winter!