I had one of those cheap spin brushes that I guess was meh. My dentist gave me a sonic care after I had done a deep clean where they numb half your face and then come back a week later for the 2nd half.
They really do make a difference. And with your husband, you can both use it - just swap the removable heads. No need for 2.
I was in the boat of no insurance, fear of the dentist, and general malaise. But when I decided I had to do something - mainly because I could SEE a cavity - the waterpik and new brush have been a godsend. Granted not perfect as I have had a few cavities since, but my gum health has been a 180 and my hygienist has been super supportive and impressed at my turn around.