@Adrax 13,
It all depends on the settings you run your clients at. I don't see how 1 FPS is playable, but if it is, then good. Maybe a $300 PC can run 50 clients. I've never tested it, so I can't accurately recommend a PC of such low cost. All of the PC's I've ever made were over $500, and they all can run 30-50 clients - that I can confirm. ;)
You're not testing me, lol. It's fine.