They can't consider the size of bedrooms, the kitchen layout, the view from the front window, or the five dogs barking all day long next door.

After this first one, or maybe two.

Not enough matching doors - replace closet doors with bifold louvered doors, move other doors around.3.

As a first time investor you have far more advantages than a multi door owner.  

Are there tiny gaps between the floor boards?

Im sure its unavoidable at times since things can happen last minute but whats the industry standard for verifying a property is still on track to be auctioned a day or two before the scheduled date?

My drain line somehow collapsed and causes backfall from the house next door into my cleanout/basement. 

I know of at least two that have construction loans that you can roll into standard 30 year loans after construction is complete and reduce your refinance expenses. 

That's for two reasons.

Should pay its self back within two years.