If you just want an app server pick up an hp elitedesk off ebay and a ups and run it on your home inet connection.
I've just been looking in to this as I've got quite a lot of older hardware that'll be fine for running some websites lying around.
My ISP has a static IP option for £5/month, but I reckon I can save £30/month+ on server costs even before any rises.
Ofc it does mean I have to do my own sysadmining, but a combination of my general knowledge + an LLM should make that relatively easy.
IF you just want a Pizza, pour some tomato ketchup on sliced bread.
If you just want to pilot a 747, drive your car really fast at a skate ramp.
Note: your ISP might cut your account, and this might violate your home insurance contract — depending on jurisdiction.
At least where I live there’s a stupid amount of red tape for these things.