@pgn , before deciding on any drug please, PLEASE watch this video. It is a must watch about the sequence to take drugs in. Boniva might be the wrong drug to take if you have the option to take a bone builder (anabolic).

Your numbers don't sound too bad considering the past drugs you have had to take for your conditions. You are doing better than I was at 62.
I have been getting great results on Tymlos, about 12% increase in bone density every 6 months.

See if you can gradually increase your weights and reps. I've been weightlifting for years and start with 2 sets of 8 reps at a given weight, then do 2 sets 9 the next time,10 etc. Once I hit 2x14, I up the weight by a little bit. Have you read the Liftmor study? Weightlifting really works.

Good luck with your OP journey!