I've seen people waiting months to get their hands on a Raspberry pi 4 to self-hosting bunch of apps. Not sure why. Something like an HP Elitebook G2 with a i5 and 8gb ram can be had for $110 on secondary markets like Amazon renewed or ebay. About 10x the performance compared to a Pi 4. Only thing missing is GPIO port. But even that is a easy fix for another $10-15. Only down side is the power draw. Compared to a Pi4, you're going to see an average power draw of 20-40 watts.