alternate plan
Welcome back to the forum. - :up
For Albuquerque, I get about 25° elevation for the bird at the 58°w orbit.
Would a new motor actually take you beyond that to the
next satellite of interest?
If you have the space, what about another fixed dish?
To shoot 58°w, the face of the dish would be pretty close to vertical.
Some dishes have a problem going much beyond that.
So, ya might consider mounting the dish inverted. (or not, but it's something to think about)
I believe the next two birds are around 14° and 11° elevation, and you'd better have a pretty clear shot to the east! -

Hispasat at 30°w would be a 2° grazing shot right at the horizon. -

I'd bet money you would never see it.
But if you could, a motor would never take you there. -
I guess my point is this.
Since the good satellites are so sparse beyond 60°w,
. . . and a new motor might only get you one anyway,
. . . . would you consider a fixed dish?