Thats how they know your properties condition has “improved”.

I would eventually like to buy and hold properties, but that will be in the future. 

We had our 3-year township CO inspection today and were told that we need to have smoke / CO detectors that alerted both sixes of a duplex property. 

It involves analyzing the real estate cycle and identifying the right moment to buy and sell properties.

For instance, at one point when I was working as a senior accountant in a property management firm, I was training a guy who was a CPA for 30+ years even though I was hired 2 months before him.I worked only in real estate accounting and financing and became CFO.

Would you be willing to buy a property you can move into it? 

What is market value of property?  

Selling an investment property can result in significant capital gains taxes.

We've owned this property for 15 years and only once had an issue with a tenant who claimed they weren't informed that it was oil and threatened to sue due to the added expense.

You may run into issues trying to take a HELOC out on an investment property, and even if you can I doubt you'd want to use it for a down payment for a primary because the rates are much higher.What kind of cash flow would you be generating from your multi once you move out?