Ron, there aren't many projector repair people anymore. If you're mechanically inclined you can maintain your projector(s). I have found a good system is to have one projector that works and another junker of the same model for parts. The 2 most popular are Eikis and Bell & Howell 1500 series and B&H 2500 series. Of these 2 brands you can select auto load and manual load. There are a lot of these projectors out there. Institutions used them and private owners as well. I have a couple of each. I prefer auto loads. You can find these for sale on Ebay and sometimes on forums. Remember, when purchasing on eBay a lot of the sellers know nothing about projectors. They may have inherited them, bought them at estate sales, or thrift shops, etc. Richard Pachette and Ken Layton are members here who restore and sell working projectors.
When purchasing a $50 or $60 projector, first lube the nylon and metal gears. I use white lithium grease. Oil any armatures. Spray the contacts and pots with contact cleaner. Clean the film path. Replace tired belts. The B&H lens cost less that the Eikis, especially the one inch and 1.5 inch. The B&H sound circuit boards can be unplugged and replaced easily. Not sure about Eiki.
If you need help restoring a projector, post photos here and members will be able to post advice! All for free! If you need help uploading photos, contact me or Chris Smith and we will help.