We were very happy with the end product.

Presently a fixed mortgage is running around 3.0% which the variable rate is about half a point lower at 2.5%.While I have not found ARM products in the U.S.A. to be quite as flexible as variable rate mortgages at home, the principal is the same.  

@Randy Landman Use this for Molds and Mildew, just mix them together with your paint, I use Glidden Paints since I get 45% off, i buy it from them, and they mix it on my bathroom paints, and I paint around 150 of them at a time. http://www.rustoleum.com/product-catalog/consumer-brands/zinsser/cleaners-and-mold-and-mildew-proof-paints/add-2-prevent-mildew-mildewcide-additive.

Essentially what the big picture is so I can expand my perspectives (unfortunately I don't know enough to be more specific - LOL!)

One of the upsides of the BRRR method in the midwest/rust belt is the availability of product.  

Like Josh said do not worry too much about obtaining exact building costs just focus on the essential information about the lots.

@Joshua Sayre, yes - if you decide to invest in A or B product there is a chance there will be fewer headaches, but be prepared to pay on aggressive cap rates as many other investors are looking for the same thing.In another thread I talk about the getting started, so let me refer you to the link as you might find a nugget of info that could be helpful to you.http://www.biggerpockets.com/forums/432/topics/188266-i-quit-my-cpa-job-to-buy-large-apartment-buildings 

And by the contractor having skin in the game, the GC would not likely draw our the process and it would be done quicker with attention to the finished product since he/she will profit from a home that will sell quickly.

Yes, they'll pitch you later for other product offers but the training is a bargain. 

The product your selling is not new if someone has been living there3.