This idea was discussed a while ago within the forum, and I'll be darned if I can find the applicable threads. I had the same issues; the cost of installing two new jacks, and my physical discomfort with the cranking.

Because we don't usually unhook the trailer during our travels, I elected to use an AC 110 V, 1/2" drive variable speed drill. If we were to have a need to unhook at shows, we are usually plugged in with shore cords, so power is usually available.

I bought grade 8 bolts whose heads fit the trailers' jacking sockets. I ground flats on the threaded shanks to give a better purchase with the chuck's jaws. By using a large 1/2" drill, the long handles greatly reduce the torque on my wrists and arms. The AC drill is a fraction of the cost, of your mentioned battery powered drill.

One thing I would be leery of, and this is only my impression, is using an impact variant drill. I realize the impact blows are many, singularly not large, but collectively, they are significant. The gearboxes in the jacks weren't design for this type of torque, a hammering staccato, and I would think a constant application of this sort, could result in internal damage.

Electric drills do work, be careful with the torque on your wrists. People have injured them selves by using high speeds and running the jacks to the stops. The jacks should also be properly lubricated and maintained, so no binding will occur while they are being used.

BOL  Gard