Thanks so much for your detailed and quick reply! As I mentioned, I'm using a Raspberry Pi3B while I wait for my Pi4. I have installed Astrometry on the Raspberry Pi and have tried using it for alignment and it works (occasionally I get solver timed out message), but slowly. I'm going to give ASTAP a try. Thanks for the tip. Based on your experience, I now see what's possible.
I'll post back with my results. One other question, are there some setup parameters that I should change for the mount (EQ6-R Pro) to improve the solving process (i.e.. less iterations).