I'm not using one right now, but I trialled a semi-mobile unit using what I guess would be the same satellite you'd be using, given your location: Astra. So maybe you're looking at one of the BeyonDSL.net packages. Max bandwidth down is around 20 Mbps. Max up is around one-tenth of whatever package you choose. As you guess, ping time is the killer if you're a gamer.
If you qualify for a BDUK code or you find you qualify for one (
Go Superfast: Now's the time for superfast broadband), you can get a subsidised installation.