If you don't feel comfortable rebuilding your starter. I've had good success with aftermarket starters. and most are affordable. I generally rebuild mine, but it is easier just to order one. I do mechanic work for a living so feel free to contact me anytime. Good luck
Oh, and I know you are not there yet, but if you have carb trouble after you get her cranking DO NOT buy an aftermarket carb. most are junk. Rebuild it. they are fairly simple and easy to rebuild.