Giant house = giant expense.
ISP should not charge u that much, they just run a long coax stapled to the outside of the house, and bring it to an outside wall your room is facing and punch a hole there. Now you should ask, how does this affect the rest of the household.
Better and cleaner + high performance, leave the box where is, in the closet, and wire your house, with in-wall wiring with lightening fast ethernet. Don't cheapen out on me now.
You wanna run long ethernet cords on the floor? go ahead, u got ~70 meters to play with.