Using a PM falls under all three in many cases, but at the very least it falls under #3.

In North Carolina, using a Home Equity Line of Credit is a viable option.

I think this is a great way to set up a business, actually, and am impressed with the way they do things, if we're not being baited.So, has anyone had success using a structure like this?  

We set Solo 401k plans for our clients in the form of a trust instead of using a custodian.

Can I use a 1031 exchange to sell property in "my name", put the funds with a QI who then purchases new property in the name of an LLC I form with someone else? I believe the answer is no because there would be differ...

This is because you are using a primary as an STR.Hopefully that makes sense. 

This is a single family home and was originally a primary residence before turning it into an long-term rental.Some strategies I'm considering to grow my portfolio are using a HELOC/1039 tax exchange to purchase a second investment property/multi-family property or refinancing my current investment property into a conventional loan to utilize another FHA loan for a primary residence (with the idea of eventually turning that into another long-term rental).I currently have a 7% interest rate, and am considering refinancing in the coming months if/when the rates drop.

Without using a data site, this will give you a free and easy idea.But, why are you thinking STR and do you know what it takes to be successful with STR now?

Remember, if you have a contract and can't ultimately assign to a third-party, you're still responsible for closing on the deal unless you have a way to terminate the contract prior to the closing date using a weasel clause. 

Does anybody have experience using a 401k loan to fund a property?