There are a lot of low mileage farm trucks that go through auction. A lot of them have been a shed except during the harvest. If you really don't have body skills you would probably get frustrated before you eve finish the project. I would start with the mechanicals like getting the engine running well and the brakes working well. You definitely need a parts truck or two if you have place to keep them. Almost any cab you find will have rusted out rear corners, but that is an easy fix. If nothing else you can hire someone to fix just that. I would look for a farm truck or maybe even a fire truck with a stuck engine and no title, but has a good cab. I watch Auctiontime and Craigslist. I still can't resist a bargain.
https://photos.app.goo.gl/e1g65WUksiDnawsX7As far as I am concerned, the only way to fix a rust bucket is to replace the cab and front clip if necessary.
