Since you and your partner are unmarried and own a primary residence together, tax treatment of deductions (e.g., mortgage interest and property taxes) requires careful allocation.

The rates vary throughout the State because of the different millage rates and tax districts, but in Richland County for instance, the taxes essentially triple once it goes from legal resident to non legal residence. 

Or are you talking about just owning a home or there that you consider your primary residence and that you STR rent when you're not there? 

If you are not planning to live in the property, then you are not going to qualify for an FHA loan.

Quote from @Junior Powe: Quote from @Jaycee Greene: Quote from @Junior Powe: Investment Info:Single-family residence buy & hold investment.

This will help you understand the qualifying requirements, key factors to consider when purchasing, and how to assess whether a property might be a good investment at first glance.

Take advantage of the Capital Gain deduction of $250,000 in primary residence per “spouse”.   2.  

Also, the term "house hacking" is generally used for your owner occupied home (renting out rooms in your primary home) and that income cannot be used to help you qualify (it is considered boarder income). 

And given their recent late payment history, I don’t know that they’d qualify with another lender. 

There are a bunch of ways to do this depending on the property type, usage, and you (income and credit scores).If this is a primary residence, you can get up to 90% of the value of your home minus any exisitng debt.