Doubtful if any other member will pay such a big amount as Advance.
The last mile connection is only copper wire from their Optical fiber cable Junction. ( limit usually 1 Mile ) confirm if otherwise.
As there won't be many users you can expect the speed promised. Is it U/L plan with FUP ( fair usage Policy. after say 10GB 20GB/month speed drastically reduced )
If your connection is just a rj45 connection better buy a standalone WIFI router.
TP LINK
Check speed from a distant server say in U.S!!!
Best of LUCK ! You have to deal with a company who can hire the best lawyers to avoid paying any refund at any cost , to "Protect' their Image /brand name !!! Read the small print !!!