I own 4 two/three flats bought between 2013 and 2020 in Forest Park, Illinois, at low interest rates and prices in 200000's  They cash flow nicely and prices have increased a lot. 

Think of vehicles like the cyber truck where you need to sign up ahead of time to pre-order and so many people want it that the value increases shortly after they are released.

The margins are tight which increases risk.

The appraisal came in at 490000k arv and the comps pulled and increase in home value since a year ago shows the property at around 515000k.

Though I expect that to increase in the future when more ADUs are constructed.

A prior cost segregation study increases the depreciation taken during the owner’s lifetime, lowering taxable income each year.

We have a property management company in New Jersey where we make some of our best clients hundreds of thousands of dollars between helping them force appreciation, increase cash flow, finding them deals etc.

the key to a BRRRR, whether it's going to be an STR or LTR, is this:distress.you need to find a significantly distressed property, such that you can increase the ARV via the rehab. 

But, for instance, I sent them a notice of rent increase effective February 1 and needed them to confirm that they have accepted the new payment terms through our electronic payment system, and even after repeated notices, they are not responding.

With VRBO, strangely, it keeps recommending significant increases which isn't wrong.