I don't trust him. I don't believe this "regaining my lost self" crap. I don't know what is REALLY in it for him, but something is. Just a feeling, from seeing a lot of connivers in my time (not just people I've been involved with--remember, I prosecuted an awful lot of crooks for things like fraud, too). He's got something up his sleeve. Call it a hunch, but this smells.
I'd feel better about it if you had someone come in and audit your finances before he gets his grubby paws on them. Get a snapshot of how things are, right now, before he does whatever it is he plans to do.