There might be Some exceptions such as you did a bunch of repairs/improvements which increased the value of your home .

., "What happens if I increase rents by 10%?")

For your first 3plex, how did you increase the rents from $2200 to $3150?

Quote from @David Krulac: Why are your rents increasing so much right now?

-Do the area demographics support occupancy and higher rents (population growth, low unemployment, low crime, increasing wages)?

Also, if you go into the BRRR strategy to add more properties faster, every time you get rent and make a payment, you’d still be paying off the loan which is increasing your equity so it’s like a savings account that builds itself.

Property taxes are especially high, as the city by default increases it at 2% per year even though market value of those condos have crashed by over 10%. 

Irvington is very similar to newark, which has very strict laws with regard to rent increases. 

Some expenses are noncash and can be added back to increase your net rental income, and others cannot.

They are often too complicated for tenants to figure out, they have too many ways to fail, and they are often easier to circumvent than a standard key lock.I use Schlage electronic door locks with a simple numeric keypad.