Should I feel sorry for tim?  

As I can understand the only reason you want to move to Miami is your flew market booth and NY is too cold for you, and not escaping from Tim. Explaining him those reasons, I guess there's nothing in NY that can hold you until NY unless it becomes the summer capital of United States.

Well honestly, it wouldn't be hard. I have never been to NYC but have always wanted to be from when I was just a kid.
I would be happy in the City as I usually am.
I would need a secure place to hang my hat and one that allowed a small quiet and housetrained dog. Ideally the location would be near a park so to walk my dog in.
I could find work once I got there, no problem.
I find that you are in your right mind for making the decision for the reasons that you have. You do not need a tag along at this time nor should you have to support someone who doesn't seem to care to help themselves, when you are struggling to make a better life for yourself.
You have a good head on your shoulders and you are working toward foreseen goals. Keep mobving ahead and if there is anything that could possibly stand in your way, let go of it. Drop this guy like a hot potatoe. Keep yourself available for someone with a like mind, enthusiasm and energy.
Not hum drum, bring you down type.
I would never let another person in my life, weigh bearing on my decisions of location to reside. Especially just some guy. If I were engaged or married, that would be a different story.
Move on and don't lok back. You are an adult and do not have to answer to anyone.

giftsandbagscom,

As you've said it yourself here that you do not feel sorry for him as he is already a grown man. Besides, it seems like he has a life of his own to which he doesn't seem to include you.

In the words of Richard Le Gallienne: “Stay the course, light a star, Change the world where'er you are.”

So, I say move on and take care.

If you are unhappy with your situation, i would not stay, if you can be somewhere else where you are happier and can be more financially stable i would say go for it. At the end of the day you need to do you. Is there a chance this person might want to move to Miami with you? That might be something you can try...Or if its not worth that just go and start over.

If my flea market was helping me to pay my bills, I would reconsider staying in New York. And if Tim, would be a better man that he is. If he stopped being so slack and irresponsible. I would have to see some big chances. If not, then it is off to Miami, I will go. You have to do what is best for you. If Tim has dragged you along with him, and he has nothing to provide for you, then you will have to take care of you. It is time that you start thinking about you and your kids. Tim may need to be alone for a while so that he can evaluate the qualities of being a real man to you.

It sounds like you have more opportunity elsewhere and folks like Tim are just bringing you down and holding you back from your dreams for yourself and daughter. Sometimes a change is worth wild to get away from elements that don't help lift you up but keep you down. You don't need that! No one does! Do what you need to do and I wish you luck in getting your business started in Miami! Keep us posted :0)