I did it!
I started pruning the garden with the hedge trimmer. I got most of one section done in an hour -- would have taken at least 3 using clippers. I pruned S, leucantha, S. involucrata "Mulberry Jam", S. Indigo Spires,Gaura, ground roses, and Lantana. I hope to do a section a day.
I will report later how well everyone grew.