Can you pull money out of a owner financed home?

[Angelo Revercomb]

My wife and I were working through some sceneries and had some questions we were hoping to have answered.

We are looking to get into multi family investing early next year. We currently owner finance a home. We have accumulated a large some of equity in this home.

1) Could we pull money out of this property and use it as a down payment or use the home as collateral for a multi family unit? (Again it is owner financed)

2) If not would we have to refinance through a bank in order to do so? 

3) If we had to refinance how soon could we pull money out of the home? Could we cash out refinance?

Please feel free to leave your thoughts!