Setting up a tile server would mean getting some kind of cloud server resources. In addition to CPU, probably large fast SSD-drives are needed. I don't know the specifics yet, but considering the commercial pricing (e.g. Mapbox's $500/month), and considering that it doesn't look too difficult these days, I'm going to give it a try. It's well possible that it turns out to be too expensive or too slow at affordable prices, but it's worth a look.