Alternate theory...
The Longhorn purchase.
BM is playing the long game, IMO.
If he has a connection to that development, he could simply be land speculating. Buy one plat, sit on it, wait for the others to sell. Once the development is built up, he'll hold the last site. Buy low, sell high.
I'm no accountant, but if you sell a property and have any sort of capital gain, don't you offset something by purchasing again? Maybe?
As for the guardianship, sure, he's SUPPOSED to document. He's SUPPOSED to manage her finances in her best interest. But is the court really watching? Doubt it. He's just moving forward IMO with reckless abandon. And by "reckless abandon" I mean cunning self-servitude.
When BM said there's nothing he won't do to bring her back, he must've worked on that sentence. Because I think what he meant was
Oh, Suzanne. There's nothing I won't do...for me. With your money.
Follow the Bobcat. Follow the money.
Scent of death meet blood money.
JMO