Zoso, I am pleased that your niece seems to be embracing a life of sobriety and my prayers continue for her as she faces using her recovery tools in the real world.
Longboat Key is among my favourite places in Florida, although I quite like the shopping at St, Armand's circle...and yes there are shops that are affordable, you just have to seek them out.
Enjoy your vacation, you deserve a break and the sunshine is waiting for you.
Hugs