Buy a good 20+ quart pressure cooker and lots of pint and quart jars. Can whatever you can grow or buy cheaply. Secret is to make things you’d eat anyway and keep the supply fresh.
For later
RE: canning...
I’ll probably try that one of these days. Both of our mothers passed last year (wife’s and mine). One of the things I “inherited” was my mom’s canning setup. A Mirro 16 qt cooker, probably 18-20 boxes of jars, boxes of lids & rings, some other stuff. Doing it that way is a lot cheaper. Heck, we’re still eating her canned green beans from the early 2000’s.
Next purchase will probably be a good dehydrator.