There are fairly durable non-slip grip tapes, but they will start to peel at some point and may create an even greater tripping hazard liability. 

@Mario Cuartas some suggestions would be to add tile or low cost durable flooring, if you have hanging lights, replace with dome lights, replace unnecessary ceiling fans with dome lights, do not provide unnecessary appliances (let tenants bring them), supply a full year of air filters if you have central HVAC, if you have window units even better, have a standard paint color you use for all the rentals so touch up is easy, etc.

Yurts are cool and not as expensive and many people like the bamboo construction and the durability.  

I wanted to know what brands are best in terms of durability and where you are buying them from for counter tops?

What thickness do you recommend for durability?

I'm looking for a cost effective yet durable paint for rentals. 

   * I'm building for durability (1st-floor polished concrete, 2nd floor some sort of durable flooring (not wood), each unit painted the same, amenities are not luxury but not cheap.* Minimal landscaping and plenty of parking, more cement!

It's very durable and looks great.

They are more durable because who knows what people do sinks-boiling water, ice, etc.

We have to replace the floor but it's not our tenants' fault, it was installed improperly by previous owner and no adjustments that we attempted worked becausehe didn'tleave enoughspace around the edges (it first bubbled from expansion and contraction abd then broke), so we are putting in waterproof and scratch-resistant higher end vinyl, to ensure it will be durable for tenants with pets and resistant to heels, spilled water, etc.