@Robert Ehrlich You forgot to add into your calculations: future vacancy (it won't alway be fully occupied), evictions /legal fees, capex (roof, painting, heating/AC, appliances to name a few). 

Many times the home will sell for less and sometimes much less if you keep waiting it out.. and then depending on what kind of financing you have carry cost eat you up.. especially in Texas were RE tax's are through the friggin roof..

Is it different if you live under the same roof? 

If there was a leak in a bedroom necessitating an expensive roof repair, would you just board up that bedroom?  

If you post all of the following items here, I'll post an evaluation of hold vs sell from my perspective.TaxesSewer and Water (generally paid by tenant)Trash (generally paid/dealt with by tenant)Heat/Utilities (generally paid by tenant)HOA (probably not applicable)Cap Ex and Ops (my personal minimum is $150/roof/month)InsuranceMgmt Fee - as a % (general consensus here on BP is 10%. include it even if you think you are going to self manage)Vacancy- as a %. (8% represents 1 vacant month/unit/year)

@Starr Ango don't forget when you buy and hold you need a capital reserve to repair the roof, replace the hot water heater etc as things come up.  

Now, the originally planned 'touch ups' turned into a new carpet (very, very bad dog pee smell), to painting all of the 1978 style wall panels (very dark and outdated look) to getting a new roof (original roof that was absolutely in pieces).

New HVAC, bathrooms, appliances, fixtures, roof, siding, HWH, etc. etc. and still included a 1-yr warranty.

The more you can fit under one roof the better.  

Find out what the owner & tenants are each paying for: Trash, water, sewer, bugs, utilities, maintenance (age of roof's & ac's) etc.