What if rates stay where they are?

Are they looking to pay STR rates?

This is because at the current rates, a high LTV property (which is required to extract rehab costs) bleed cash. 

This means the interest rate gets bid down to al low as 1% and the price of the homes is bid up to an amount higher than you can sell it for.  

At acquisition, the in-pace apartment rents were ~30% below the market rate, and the expense ratio was at least 10% higher than it should have been.

All PG&E, SDG&E, SCE, and community choice aggregation residential customers — except for California Alternate Rates for Energy, or CARE, and Family Electric Rate Assistance or FERA, customers — will have to pay this tax, and it cannot be reduced or avoided, no matter how little energy a household uses.

This can trigger unfavorable tax rates when the property is sold, plus there are potential loss limitations, transfer issues, distribution problems, etc.  

2) Each taxpayer has their own tax rates to consider - Federal and state tax rates.When determining state tax rates, they need to potentially calculate the state tax rate of the resident state and the state where the property is located in.

Don't keep your home because of the low interest rate.

IF I'm going to make extra principal payments to pay off a "low(er)" interest rate mortgage early (compared to today's rates), my gut reaction would be to pay off the highest interest rate mortgage first.