From a construction perspective, I would recommend a Hardiplank siding or its equivalent (fiber cement, etc.) for tenant situations if you are going with traditional siding.

Two have been sold to pay for completely replacing most of the cement at the complex and doing other needed work, and two more are in reserve for the day when roofs or sewers need to be replaced or something else major that might not covered by the standard 10% of dues reserve set aside.It is an important point that you bring up though. 

In those buildings we placed tenants such as the Federal Government Agencies, State Government Agencies, Indian tribes, small businesses, unions, doctors, dentists, stores, hair salons, etc.

Aaron Mazzrillo, all good in theory, but almost everyone who wants money from me periodically sends me a notice - mortgages, utilities, dentist, etc.

My property had rotting exterior wood siding so we decided to renovate the exterior of the house with fiber cement board as well as install new front door and new wood on the front porch and rear stairs bringing the exterior in line with the other rehabbed properties.  

It could be asbestos-cement, or wood coated with lead-based paint.

Ben Siegelbaum I have 3 places built 1910-1920 and they are solid structures with full cement basements.

I just was shocked when I heard from my dentist friend today.

Newer roof, siding, windows, and cement.  

I have used the 1/2 inch Hardiebacker Cement Backerboard and have not had any grout cracking or tiles coming up.