Well I think my suspicions that I am only going to be able to afford to replace those MOST critical parts are true. I just got the quote from Clausing. Yikes! I think I'll pick up the feed gear, cross slide nut, and a few springs. I'm going to make due and or come up with fixes for the rest like I had already planned.
I attached the quote so you can see the prices.
I am following this thread with great interest as I just bought a 4902 that came out of a school in Bridgeport and I know I'll have to get into it in the coming months. Thanks to everyone who takes the time to document and post this info for tentative people like me!