Welcome to the board from Southern California!!!
There are lots of places that will take quilt tops for donation. My guild takes them and others in the guild will quilt them. Jan in VA puts together quilts to send to soldiers and she will take tops. There are probably people on board here who have Long Arms that would volunteer to quilt tops that are for donations.
Do you have a friend that can help you? I take mine to my church, push tables together and spray baste them with the help of my husband or some friends. Maybe you can recruit some of your grand children to help you sandwich them?