All your scenarios are possible, but no, FSL is not difficult. Why do these things always happen with a 28,000 stitch design though!?
"I" use 2 pieces of wash away (not the kind that looks like Syran wrap) and turn them at 90* so that they are crossing. I can't speak to the magnet hoop but if it holds it as well as regular hooping I think it "should" work. Otherwise you may have to hoop the stabilizer.
Good luck ~ Pat