Yes we replace the cheapies once a month in the apartment building.if the tenant has asthma or allergies and needs the better filters then they have to buy them.The thicker filters are fine but have to be replaced more frequently than recommended.I have highest rating in my home for filtrete filters.Recommended says every 3 months but I change every 6 to 8 weeks otherwise it starts drawing to much power and cutting air flow from catching all the particles.

Thicker paint also means less drips.- Sherwin Williams set me up with a contractor discount so I don't need to shop around for the sale price of the week.

It works well in scenarios where you have a flat, level surface that is perfectly clean, or when you can easily create one.You should probably use the thicker ones (~$1 per tile) because the thin ones will scrape or tear really, really easily.  

In those cases using a slightly thicker (5 - 8mm) or {better, but more costly} cork underlay will deal with the tick-tick-tick of heels.

You will need a much "thicker skin" to succeed in real estate - and an ability to accept advice and "know what you don't know"Bottom line is that IMO you are not ready to run a successful business, just as you are probably not ready to run a successful medical practice or law practice.

I'm amazed you haven't developed a thicker skin with all your years of investing experience.

I hope you get a thicker skin quickly

Thicker paints require more power and will put much more wear and tear on the unit.As far as interiors, I only spray ceilings now when we are going to do all of them at once, even with that we always have someone come directly behind backrolling which stops any striping. 

I did have to grow a thicker skin,  though,  as not all tenants are of good will!  

Their files are a little thicker with annual inspections I don't have to attend and financial determinations but no biggie.