Things were going well but now things are really bad and it has nothing to do with COVID-19.  

If they have been paying well under market rent for a long time they may have a hard time suddenly managing a place at current market rents.

My situation currently is I have 1 SFH rental that is owned by my LLC and doing well, and also I'm doing a live-in flip on my primary residence.

My education background is in computer science, mathematics and some corporate finance, as well as have some internship experience in the quantitative finance space.

You have used home equity lines of credit to purchase investment rentals and want to know the best way to pay down the HELOCs.Between the two properties you bought, after expenses, you have $250 a month positive cashflow to use.What I like to do is pay down some principal every month with my positive cashflow.I use my extra active income from real estate commissions helping other investors to pay down the principal even more which just frees up that credit for me to use again.I know I can refinance the HELOC debt before it changes to principal and interest as it is just interest only payments as yours are.One difference is the cashflow, I have greater positive cashflow and could make the principal and interest payment in the future with the extra cashflow I already enjoy.I always get HELOCs on my income properties as well after purchasing them to pull out as much of my downpayment as possible.

However, a few things you could do: You could talk with them & learn more of their story to figure out why their credit score is low as well as the type of people they are.

All well and good to dream big, but you need to understand the practicalities and probabilities of getting the deal to closing. 

While it might feel like an extra charge to tenants, these packages often provide value that indirectly benefits the property owner as well—like reduced maintenance calls or ensuring the property is better protected.In my experience managing a large portfolio of properties, these fees are becoming more common due to the thin margins in property management.

We will see more investors walk away because the properties aren't performing well, but other investors will pick them up and the quantity will remain high.Rates are anyone's guess.

Buyers Want More Than a Pretty HouseSan Diego buyers are discerning, and they don’t just want a house that looks nice—they want one that functions well and reflects their lifestyle.