As someone who's currently lengthening with Paley and was considering leaving after the 2nd week here, I feel like I have some insight for your question.
Lengthening at home is not worth the few thousands saved.
First of all, Dr. Paley can make calls after a follow up with you that would require you to come in the next week, instead of the next 2 weeks. That's what he did for me, after he saw my first x-ray and was concerned about my fast consolidation.
Secondly, practically everyone advises against it, the doctor, PAs, and patients lengthening here. You have everything you need in the hotel you stay at (which is entirely handicap accessible) which you probably won't have at home.
Thirdly, transportation is difficult. Imagine this- you have to lengthen and stretch everyday, how are you supposed to do both stretching and lengthening when you're on a plane most of the day travelling to WPB and back? Unless you stay at a hotel for the night, but then you're squashing PT and lengthening into a short period of time.
I was in your same position, wanted to save money but most of all, wanted to live with my parents and have them take care of me. But I realized, the short 3 months I'm here which are already fully paid for, are entirely worth staying for. I get everything I need, and I'm also safe. I can stroll into the clinic and get a follow-up with either a PA or the technologist if I think anything is wrong. You are also surrounded by a community of lengtheners who are in the same position as you and know what you're going through. There's a wheelchair accessible lift into the pool which I'm sure you don't have at your home. There's a lot more reasons, but to sum it up, it's worth every penny to stay.