WH, My stbx did the same thing with his L - he plans to represent himself because it is costing too much.
Just too weird.

He also started to go to the kids' schools and speak to their teachers without telling me or the kids.

Mine's like a dog that's foaming at the mouth... I'd stay indoors and let him roam the streets howling at the moon. Don't want to get bit by that!

That's a mean way to put it but, boy, these guys can get nasty and thrash about.