Your ISP isn't relevant to the quality of how fast your server will run
Here's my proposal, attempt an investment : buy a better router, and just use your laptop to host, it would be good and you wouldn't have to spend monthly fees on a VPS service, I don't know though, just an idea.
I've already switched my servers to a high speed VPS. It costs more than RTB and lacks the fancy interface, but it gets the job done.
you didn't have to do that...
Residential networks will never be able to accomplish the level of hosting quality that a professionally hosted server can, particular in the case of someone like Pecon or whatever whose servers average 50 players.