One of the bigger issues now is in general how wifi doesn't extend too far into the house. On my desktop at my old house I used wifi and was a room away from the router and had super inconsistent wifi. I'm like 2 rooms away from the current router and wifi is unbearable now. Using an powerline outlet adapter thing right now but get 14mbit down when I pay for a 60mbit down line.
Considering this or the one Axel recommended right now.
http://www.amazon.com/NETGEAR-Nighthawk-AC1900-Gigabit-Router/dp/B00F0DD0I6
Oh my, I have T-Mobile but didn't know they sold/loan routers. I'll have to look into that.
Why not call someone to do the ethernet cabling from modem to your desktop?