Janet's numbers for replacement parts are close to mine. Aquinbob is right that you can source used or sale pricing if you have the time and budget it tighter. Obviously, the more you're willing to restore with your labor, the more you'll save.
Can you move it? Check bearings and electric brakes. If it still has original split rims and/or rotten tires, replace them. Look carefully for rot where the rounded front/back segments meet the floor. If there is a gap, add plywood blocking supports as shown in this thread
What to look for in inspection? If you're already planning to replace the floor and axles, then the skin and frame are the most critical. Look for bad floor rot and, if found, look below for significant frame rot. If you can poke an awl through, that frame member will probably need replacement. The rest of the parts / budget are listed above.