Bea posted this to you: "Thank him for letting you know, say you are very sorry that he has come to this decision, but acknowledge that it is his choice." Her suggestion is spot on and to the point. Do not add anything else to it. You are now entering in business negotiations.
You have some time to make decisions about moving, however, you will need to start looking. Your dogs are little and people may not have an issue w/them being small. Get through your interview, complete your project and then sit down and start making a list of what needs to be done. It's one step at a time.
Yes, she will need to consider getting a loan. As for the house, you can't afford to keep it. Just remember, home is where the heart is and you can find a nice place that is affordable for you to take care of. Your current home has a lot of yard work and the upkeep may be very expensive and he will not continue to pay for the upkeep.
Take care of yourself. Put your business hat on and start thinking w/your head and not your heart. I know I am sounding harsh this morning, but you've got to move out on your finances and get a lawyer. Don't sit back and think he'll change his mind because he won't. You are the only one that can take care of you right this minute.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.