Would the longarmer be willing to teach a couple of your group how the use her machine and then allow them to finish quilts under her supervision? It would be asking a lot but not as much as her shouldering all the quilting.
One of our ladies designed a fleece backed cloth bag about the size of a regular garbage bag (with minimal quilting to hold the two layers together), added a duvet zipper around one side and bottom, plus a drawstring top (not knotted) for children in foster care. The aim was for the child to have something to carry their belongings during a move and also opening the zip, a cuddle blanket. Our local Family Services group loves them.