I'm worried about YOU in this situation. He could be stringing you along with no real intention to leave his wife. I'm a bit suspicious of his excuse with 'money' being his explanation. If he really wanted to leave her to be with you, he would find a way and not drag it out for so long.
I could be wrong.....but I just want to point it out. I want you to have happiness in life and not have to deal with things like this. It just doesn't seem right to me, but I'm just an outsider looking in.