(It's now supplemented with a beefy GPU self-hosted server, and I can also use cloud servers.)
One thing you can do to keep old production computer hardware going is to stockpile your backup/parts units and individual parts now. Many times I've noticed how some old hardware I used to see a lot of on eBay has disappeared, or the little remaining is in much worse condition, or only available as a single example priced like a museum piece that sits on eBay for years. Some small parts seem to be available despite what I'd guess is low market demand, but entropy gets a lot of old gear (increasingly stuck in collections, discarded, worn out, etc.).