Is it possible to have either 2 all-fi hubs or separate att internet air accounts at the same address?

I live off the road about 700 feet, just went from att copper line to att internet air. I also have a guest house on the property 150 feet away where from the all-fi hubs is. Got an extender but it's to far to set up at the guest house and I have the hub upstairs close to a window which faces the guest house and the extender is 1 floor down and about 8 to 10 feet out towards the guest house in my formal dining room. But the signal barely reaches the guest house. My question is, is it possible to get 2 separate hubs for the same account and pay the difference OR 2 separate Att internet air accounts on the same address?