I'm under the impression that a co-signer should be well above minimums however my partner is less hesitant.

I'm new to real estate investing and though I owned rental property in the past, it was primarily because I moved and had a co-worker who wanted to rent my house so I did for two years and then sell it (looking back I wish I kept the house).

@Jenna BamletInstead of Subject To; I would look to sell the properties or have your partner purchase (in another LLC) and finance them without you being a co-signor.

In my course, we are learning about co-ops, but I'm confused about the benefits of a co-op.

I also own my home, a co-op in NYC.

Do you self-manage or plan to use a co-host?  

Due to my high debt to income, I am not able to qualify for a refinance.Monthly Income: W2 2426Property 1 Rent 2200Property 2 Rent 2700Total monthly income: 7326Expenses: Property 1 Mortgage 1306Property 2 Mortgage 2177Property 3 Mortgage 1284 (This is a co-sign loan)Total monthly expenses: 4767Besides selling the property with the high equity, what are options or strategies I can use to continue growing my portfolio? 

You are referring to a “co-managing with a property manager” situation.  

If you opt to hire a property manager (PM), add the PM as a co-host.

The difference is that you are listed as a real estate coach and a co-host.