We used Dormkaba e-Plex on our 24-unit apartment for exterior doors and never had a problem.  

And it is for this reason why a good REI Buyers Agent is worth our weight in gold, literally, because we make sense and order out of the chaos.

Of course, you can do tax write off if you own investment property using Schedule E, but please consult with your CPA the best way to do this in your particular case. 

. § 1.469-5T(e)(3), the combined rental real estate activity is treated as a limited partnership interest of the taxpayer for purposes of determining material participation. 

Here are some of the highlights: quickly set up bank accounts for each property and sub-accounts under those for things like security deposits and CapEx; virtual credit cards tied to each property; quick transfer of funds; ability to send money back and forth to tenants (some platforms are for collection only but won't let you send your refundable deposits back to your tenants); easily categorize every transaction into IRS Schedule E categories for reporting taxes; ability to split transactions; tenant management from vetting to drafting lease agreements to collecting rent.

In the past, RentingFamilyMember has filed Schedule E and apportioned expenses by rental percentage, including mortgage interest and real estate taxes between Schedule E and Schedule A.

I quickly observed the tenant had a dog, a roommate, and an Olympic weight set - none of which was allowed per the lease.

A follow up on this: do you all have mentors that you go to before making big R/E decisions? 

On Schedule E, I can see the rents received for each property along with the interest paid.  

Does the company provide E & O?