$90 8qt Instant Pot It's dramatically reduced the number of times I eat out for convenience rather than enjoyment. It's larger than I need but perfect for bulk cooking/meal prep.
A chest freezer costs more than $100, but is a great way to build on top of this strategy.
I have a friend who's big-time into growing and harvesting locally, including as a part-time job. The trouble is to keep up with the influx; I'm thinking of freezing some of it for the colder, lower harvest months.
P.S. Through them, I've discovered this significantly suburban county is teaming with... I don't know, sort of a sub-culture of like-minded folks. It's been a rather interesting year.