30mph is pretty uncomfortable on a hardtail. Consider adding a suspension seatpost. Also, pedaling doesn't help much at 30mph and up-- the added drag from flailing your legs around mostly offsets whatever pedal power you make. At lower speeds, pedaling is still a net win, and you may in fact spend a lot of your time and miles at lower speed.
If you intend to cruise at 30, don't expect pedaling to add range over whatever you can get from your battery alone. But it's doable. Either Bafang BBSHD or Cyclone will suffice, if you're of normal size.
There's nothing about the Litespeed Ocoee that would prevent installing a mid drive, but it would be a waste of a nice bike. A cheaper aluminum framed generic bike would do just as well as an e-bike (with suitable components), though the Litespeed is a much nicer pedal bike.