at what point does it make sense to use a heloc on an investment propertywould you use one to buy the property cash (house is worth $50k) not a lot of room for appreciation, but the rents make sense for me to sit and hold it.in what situation have you guys used a heloc?

A heloc is an open end mortgage or in simple terms its a high risk credit line similar to a credit card that sits in 2nd lien position adding another trade line to your credit and reducing DTI.Just like a credit card if you ever miss a payment on any debts on credit or if your scores drop unexpectedly they bank can close or reduce your line of credit.

It is all about if it will helps the sale, in price or time it will sit on the market  which it ultimately comes down to money because of holding costs. 

I have been researching the Huntsville market for some time now, and one day I realized that there were a lot of rental listings on Zillow that had been sitting for more than 100 days, which is a red flag to me.

The rental market at $10,000/month is super thin in DFW and you may sit for months vacant and vacancy kills any returns and you likely don't really have any anyway. 

I have notice quite a tremendous amount of properties listed for rent on zillow and they have been sitting nearly a year .   

Due to the run up in the market (and trying our best to buy low), our leveraged asset return currently sits at 38.5%.

The value is continuing to increase on Hilton Head, but with buyers sitting more on the sidelines with interest rates, deals are being done in this market that can only be done right now.

In Texas you have to have your real estate license for 4 years before you can sit for you brokers license.I would suggest getting your RE license and then working with a PM company for the next 3 years so you can get your brokers license. 

Quote from @Jonathan Greene:  So after sitting on this for a few days Airbnb seems like a stretch right now.