It is almost impossible to push your equity appreciation that much in one year.  

Since it’s impossible to create a true cost per side, I just waited for renewal time and made adjustments based on fair market rents. 

I came to Australia about 7 years ago from South America looking for a future and survival of my existence (literally), since Australia's market has become a big financial bubble quite impossible to penetrate, I decided it was best to get into USA since I loved this country when I just a child, I always have.

We all know the higher the cap rate the better (I prefer 9% or better) but those seem almost impossible to find.

I know the pay off is high but is it impossible to do a deal where the cash on cash return works for a rehabber?

Your experience may indicate otherwise which makes your decisions impossible for me to comprehend.

It makes redemption virtually impossible.

Being faced with move-out and higher market rents it was all of  sudden a more favorable idea to buy with a mortgage payment near his rent, but I think the lack of 'bankability' making a conventional loan impossible sort of spoiled the deal.

Though he was telling me it's impossible for him to give 100% accurate repair estimates without looking behind the walls.

It is not impossible but it is definitely not quick and you need considerable time to stay on top of things.