OP don’t need personal detail.
But you stated your kids get free rent and free education. Your topic is about CAP rates and DCSR.
My point is I don't care about CAP rates. As an example is your situation above. I can change your personal cap rate very easily.
A. Get your kids to pay rent. That will increase your DCSR and DTI.
Pay your kids education and deduct it.
Do they have a car? Deduct it.
Now you might say the above don't make sense. Or are not legal. Talk with your accountant and understand how you achieve the above.
Based on the above your view of a cap rate 1/2/4/6 becomes different than another investor.
B. 1031, downsizing 2 out of 5 primary, corporate or military move, fired and moving, married and combined income, etc. Each persons view of cap rate is different.
C. As @Chris Seveney said a cap 2 isn’t a cap 2. Could be from a capex standpoint, resale standpoint, property tax. Again each persons view of cap rate can be different.
Plus who gave you the CAP rate? Do they even know how to calculate? Plus what can you do to value add the cap rate.
My point again is we don’t use cap rate. The fun is what each of us sees in the deal and how we add value.
Below is a storage property we just looked at in Pisa Italy. Let’s say it is a Cap 4. I am willing to pay a 5, because I can get an 8 value out of it within 6 months. If