Having efficient heat source is one of the factors in tenant longevity. 

There's no issue with WalMart paint, other than it doesn't have the coverage, longevity and scrubability properties that higher quality paints possess. 

I am just wondering if you exchange below market rents for tenant longevity.

@Devan Mcclish  couple things having a RE license then a brokers license is the key to longevity in this business what's hot today won't be in 5 years and your in the business you will adjust and make money in all market conditions ( usually and if your nimble) a wholesaler has a very short shelf life in most cases..

This RE game is about consistency, stamina and longevity. 

Not sure what you mean buy "longevity", but buying houses you intend to sell is a different business than buy and hold.

I certainly appreciate the longevity. any advice would be greatly appreciated.

As far as longevity, I see no issues with window units failing faster than central A/C.

Lease price, structure, length and longevity of the current tenantsCondition of the capex items including the roof, structure, water tank, furnace, ac, appliances etc. 

What does the Water supplier require to attach to their system.If water or soil ph does not affect copper it is the best and obviously most tested for durability and longevity in the interior or exterior.