Wireless internet availability?

On the availability check, it shows no service in my area. I have been told numerous times landline is not available for my residence. There is a landline hookup that has been here is 1981. I have worked on computers for many years. I have a LTE wireless connection now with another company but it is very poor service and is as tho they have oversold their capacity as it was better service ten years ago. Also, the broadband site I use shows ATT wireless signal here overhead. I would be happy with five or more mbps down and one or two up. I have been with ATT twenty years with cell phone here that gets cellular data. I need unlimited and asked for business since I want to set up a website. I am a disabled veteran and do everything online...have to. ATT business rep contacted me but has not replied. Of course I need a lower price which i believe is the eight mbps at eighty dollars a month business so perhaps not enough money for ATT? My neighbor is about two acres away and has ATT wireless internet. I dont understand what the problem is...I have no reason to believe that internet would not work since I have a landline on the building but it is not hooked up but could be. Anything I can do?