It's not worth it if you aren't going to make this your career. I had my own business for several years and trained a ton before that. It's been almost 4 years since I technically have my ammy status back, but I haven't stepped into the Hunter ring since I left. Other than locally/unrecognized, people would not be very happy to see me in an AA class. I've found dressage a little more welcoming of people who flip flop between statuses.
If you want to work horses for more experience, you can always trade for things like rides to shows or schooling sessions. I personally like free rides to events. =)
If your horse says no, you either asked the wrong question or asked the question wrong
And God took a handful of southerly wind, blew His breath over it and created the horse