Yo want no regulation or industry standards for the STR's, you're ok with this because it works for you, imagine now if the Natural Stone Institute had no standards or regulations for the countertops you're installing in your units and now you're emitting toxic chemicals for all of your guest, then take this scenario onto the plumbing pipes, now look at the flooring requirements, If everyone who has some sort of profit benefit in your Asset took the same position and wanted no government oversight or regulation in the name of individual tunneled vision profit, we'll be back where we were in the 60 and 70 with mass numbers dying from asbestos and lead poisoning all from renting your units.   

Purchase price: $375,000 Cash invested: $75,000 Sale price: $515,000 Cosmetic flip work including- kitchen cabinets, countertops, appliances, interior paint, flooring, electrical fixtures, reworking the master bath layout, vanities, and deck repair.

The figures above include LG/GE stainless steel appliances, quartz countertops, engineered floors (don't do laminate!)

Has anyone had any experience with solid surface counter tops? 

The interior will need new cabinets/countertops, lighting outlets and fixtures, minor drywall repair and patches and paint. 

Trust me, you'll eventually need to replace the roof; you'll eventually need to replace the HVAC system; you'll eventually need to replace the water heater; you'll eventually need to replace the toilets, carpet, countertops, paint, light fixtures, doors, windows, etc.Now, some new investors think to themselves, "I'll sell before I have to make all those high-dollar repairs!"  

I recently took an apartment that was built in the 60's and added granite countertops, double sinks in the bathroom and washer/dryer hookups in a couple of units. 

Mostly just cosmetic fixes. 1 unit that needs most of a new bathroom, and cabinets/countertops.

Maybe the street was a little busy, or it has ugly countertops, or whatever.  

The house was flipped with new appliances, granite counter tops, jacuzzi tub in master etc.