The problem with this is that someone can pay you in BTC and then you could go ahead and cancel you VPS and leave them scammed.
escrow doesn't work in this case either as the goods are digital..

I would highly advise against any users trying this trade as you will likely end up with no hosting or BTC that you paid for it.
Go and purchase your own VPS... as this is sketchy as shit and my BTC would be on that this ends up a a scam.