In addition to this, I've had 2 clients this past year tell me they used Airdna in '22 and '23 to see projected and estimated income and was drastically different than actual income made with very comparable properties. 

Otherwise, you will likely be copying someone else's false expectations.I have reviewed hundreds of such self-constructed logs, and most of them will not hold water.

Compare it to the area you grew up in.

Interest rates between a HEL and a refi are comparable, the equity in the property is equal to the value of the property and I only need about 50% to purchase another property.

As you begin your REI journey here is one tip I have for you:Use this website as you are trying to narrow down the places you want to invest in. https://www.areavibes.com/Its awesome because it gives you a "total livability score" & you can compare different zip codes & streets to others. 

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

Unfortunately - my current lot for my primary is 1 acre and VERY sloped, and close to a water source (creek), so the county has not even allowed me to permit my downstairs finished basement without an extremely costly renovation to our septic (over $60,000, and that doesn't count demo'ing and replacing our driveway to get to the existing tank and leachfield), and even if I could permit it, it would essentially need to be a treehouse in the redwoods due to the slope (not a bad idea though, I would actually love a livable treehouse on this lot!

I do feel like Haverhill is much in the "path of progress" than comparable areas like Lowell and Lawrence, so it's a city on my radar for sure.

Also, my guests always love my little goodie basket of snacks and a few bottles of water. 

Leverage magnifies return. 3) The effort involved in adding an ADU is comparable or larger than a rehab associated with a BRRRR.