Ah, the old metric / imperial problem. I’m sure there are a few that have been built in the US. Corey might be the best person to talk to (he has put his in the gallery here). I imagine that a few tweaks could solve the issue rather than a redesign. Price should be roughly the same regardless. It all depends on what you can lay your hands one.
Generally the V3 is the one to go for. But also don’t discount a no rotator setup if you have a pass friendly location there is a bit more info here. Great for getting to know the way SatNOGS schedules. There may also be other ground stations that you could make use of to supplement your own rather than having to rely on a single ground station. After all thats one of the cool things about SatNOGS.
Alex