I don't think I'll be getting the fiber option anytime soon. I'm on the 50Mbps plan with dual lines sync'd at 30 and 29. According to the tech I am also maximum distance from the box for the 50Mbps profile. Only other option is comcast but the upload speeds are horrible.
Anyways back to the OP.. How big is your house and what is the layout?
I've helped friends setup similarly in 2500sq ft+ 2 story houses and the wifi is pretty acceptable using combinations of 2 normal $100-$150 range AC routers. One as router and the secondary as a wired AP.
2400 sqft home. my main router (asus ac5300) is in the living room in the center of the house. however, the connection is weaker and slower when I am in any of the bedrooms. especially the bathrooms (because they are in all of the bedrooms).
I was thinking since i had 3 routers, why the heck not used them in 3 sections of the house. which is what it did.
When they each have their own SSID. speeds were amazing! but this meant that i had to manually select and change my SSID every time I was in that section of the house.
but then I thought, anyway to seamlessly combine the wifi's all together so I do not have to manually change my network names each time I am in a section of the home?
I thought about giving them all the same name... it basically did not work. I had to manually turn off and on my wifi each and everytime to connect to the strongest signal, bigger pain of other devices where i could not do that so easily.
so then i learned about AP's. easiest AP to do? Asus AiMesh. Loved how it worked but it became an issue when i started to have guest over. realized that the Asus routers would lose one of the 5ghz bands to enable wireless AP. this meant a decrease in speed. why pay for high speed when you cant use it?
so more researching lead me to going the normal old school ethernet AP route. which created another issue of the ATT gateway not releasing weak connections so the AP can pick it up.
As of right now, I basically almost given up. I turned off wifi on the ATT gateway and only using 1 router, the Asus AC5300... just gonna deal with the slower speeds until i find a better solution.