I don't know if the 2 structures is a gift or a curse given the ages of them. 

Real estate training now in this age is everywhere. 

It seems like a lot of work but, in the Internet Age today, the information is at the tip of your fingers.

As Account Closed mentioned the tenants being 55 plus tend to be very easy on the property.Single-family without any age restriction tends to see a little higher demand, makes sense since 100% of the market fits the bucket.

For less than 6 properties, I estimate my big item expenses (roof, water heater, paint, carpet or floors) taking consideration the age of each times that commonly required replacement. 

I think along with the software and tools themselves, it is extremely important to have good customer service at all times - this is often forgotten in the digital age, so remembering that aspect is vital. 

This can vary a decent amount from sub 50% to around 60%.The main way I look at underwriting these properties in a new market is to do a few properties that all have similar age, location, asset class and have the projections verified by local property managers. 

Question 4: do you care about the age and the area of a MFH?

Remodels are going to be 100% dependent on the age, condition, area, materials used in construction at the time.  

Following the age old advice of invest in what you know How did you finance this deal?