I don't want to discourage you as I wanted one for years and finally got one for "free" about 5 years ago. I now have close to $5000 in it. New tracks
$500 ea, re-built bogies about $500.New crank,pistons and carb etc about $1000. Paint,fiberglas and upholstery work another $500, but that one looks a little better than mine did originally. Rebuilt elec starter and pull start. That 640 cc Rotax is a real bear to pull over manually when it is 20 below. New battery , lights and wiring, can't remember how much. Little things like kill switch , dimmer switch, ignition switch, throttle and brake cables, brake pads.
My biggest problems have been the clutches. Driven clutch wasn't bad but engine clutch is unavailable new unless you are willing to forego the elec start. I bought a new old power block last summer but it doesn't fit. Lots of little things like axle bearings and seals. That thing has 32 bearings for just the bogies alone. I thought I could do it for $2000 but once you get into a project it is hard to know where to quit. Probably would do it again but would want one with a 503 and lo-hi range transmission. This one would regularly pull 2 sleighs with a total of 5 ,45/55 gal barrels of fuel and av gas so it does the job. I am in Thunder Bay On Can so no help in getting it for you. Just felt I shold give you the "benefit " of my experience. Good Luck, Wilf.