It is natural that the couple in their 50s occupying your most expensive property will be more settled and stable than a younger family that may need to change living arrangements due to job or school factors.So far as wear and tear it is obvious that a family with children will be harder on the premises than an adult couple. 

Not familiar with total view either but you should be using recently sold properties exclusively in your research.

Two sellers showed us two exclusive tapes with over 150 loans with UPB north of $35 M.

I utilize my knack for numbers and process attained from spending most of my adult life as an accountant which led to being a cost analyst.

*Note: If the period of non-use was for 1) 2 years or less and due to a change in employment, a health condition, or other "unforeseen circumstance" described in Does Your Home Qualify for a Partial Exclusion of Gain?

I will preface this answer by stating that my experience is exclusively in investor, non owner-occupied properties.

In other cases, agents who work mostly or exclusively with investors are all about avoiding most end buyers and sellers.

@Andrew Leung, It's tempting to try and make a family deal work, especially if it's off market or an exclusive. 

2-4 units typically sell based on comparable sales. 5 to 10 units in some places will trade based on either cap rate, comparable sales or price per unit. 10+ will typically be based on cap rate exclusively with some exceptions.

A friend of mine has a few properties that have been exclusively rented by sororities for many years, but he hasn’t had many issues.