(to keep things simple)Property was primary residence for Person A from original purchase until 01/2020.

Your primary insurance policy with $300,000 in liability coverage should be sufficient in 99.999% of all lawsuits.5.

I am in NYC as well looking to get a heloc on my primary residence.

Hey Cameron,Sorry for the delay,  in math terms 6% is 1.5 times 4%.However, for tax purposes it is not that simple, for your primary residence you get a lot of tax breaks such as not paying for schools, and an exemption of the first x $'s etc.  

@Landon Lehmann many investors borrow against their primary residence equity to invest.Getting a HELOC can also be the path of least resistance and cheapest.There is risk though, that if you investment results in a loss or lawsuit that you could lose some or all of that money and more (lawsuit).Getting more insurance is typically easier than setting up an LLC and meeting all the requirements to separate your business from your personal assets.What are you doing to source potential flip properties?

We are nearly finished renovating a rental property in Oklahoma, and have started rehabbing our primary home in Tucson, AZ.

My local banks will only do a heloc on a primary residence.

People have been adding family and friends for years to their tradelines to help them establish credit at 18 etc. fico 8 actually can tell you which tradelines are primaries etc.

@Ian Stuart, Does equity in a primary residence count toward net worth?

Short term rental homes/units drive up the price of homes faster than primary residences and long term rentals.Shifting from long to short in some locations is perfectly reasonable, however I highly recommend you check out your local city's ordnances discussing the requirements for short term rentals.