My local cable TV/internet provider has a new service they've named "Echo." It's whole house wi-fi. They will, for $29.95, come out and install access points in order to eliminate wi-fi dead zones. Of course, that will also cost you an extra $10/month plus $3/month for each AP installed. Their APs are directly wired to the cable, however. If you should need additional APs installed or a service call to correct a problem, that's another $29.95 charge.
I solved my household's wi-fi weaknesses with a one time $24.99 purchase of a Dlink DAP-1320 wi-fi range extender (essentially a wi-fi AP). It was a Black Friday special which normally retails for $40 or $50 depending on where you shop. Set up was effortless and took mere minutes.
This really isn't rocket science, folks.