For the record, my guys and I are not too shabby at installing and finishing hardwood in place ourselves, but for rentals, we tend to stick with $2.99/ft2 plain-sawn No. 1 red oak on sale and three coats of oil-based poly at $100 per five-gallon can.But even if I could get the kind of ultra-high end oak flooring Joshua's talking about cheaper than PEI 5 impervious tile, I would still do the tile in kitchens and bathrooms.

My allure and allure ultra floors I just scrub with a scotch or brillow pad until the scratch blends in.  

Here is an article I've saved which can contribute to this questions. 7 Habits of the Ultra Wealthy

I cant beleive these ultra experienced guys would even give a rookie like me the time of day.

I’m a bartender to the ultra wealthy now which is easy, reliable income, but I remember working at a casino where I had to choose between the high-roller who’d pay me 100 bucks for a lucky beer or the tweaker lady who’d order a blended mudslide with 5 free cherries and tip me in pocket lint.

The 50% rule seems ultra conservative and very difficult to obtain in the ca market.

The only other such person are ultra-liberals like Paul Kurgman, but I think his agenda is to have the government fall so we can all be fellow comrades.

Be ultra-conservative about the numbers and you should be ok as long as you find "boots on the ground" to validate your numbers and property condition.

There are however an unexpected number of very wealthy and even ultra wealthy individuals as there is throughout Asia. 

Maybe some 11-12%, but that's on the ultra high end.