Excuse me if I ask, but it seems you want to use primarily 50mm/ 2" tires. Why not get a gravel bike? There are some models that can fit up 2.2". Don't get me wrong, I love my fat bike, but it has it's limitations and for a superior price. Check out the Salsa line, they have many wide tire models for about the same price. There is also the 27.5"+ range which can go up to 3"
Not trying to burst your bubble, just trying to offer some viable alternatives
Cheers