Plus, Seth Williams has an amazing amount of information as well so in the same manner you wouldn't buy just one book on real estate investing from one author, you should probably investigate all the different angles and methodologies of different land investors.  

Personally I would be wary of using their service without understanding how thorough their checking actually is, and their methodology.

I want to make sure I am handling the taxes properly from the outset, as once I refinance later this year I want to make sure my calculation methodology for claiming expenses/depreciation/etc is consistent for as long as I hold the home. 

I currently reside in Torrance.I haven't visited the forums yet however, you will see me there as I am a serious and committed investor however, I am learning the flip basics and I am impressed with BP methodology and hope to be an asset to the BP community, quite soon.Cheers ~Rob KuchtaTorrance, CA

Based on your methodology, i.e.

What is your approach or methodology on best and final offers in Oklahoma.

I haven’t read into David Greene’s methodology enough to know if he advocates using an agent and a PM (two different people, instead of one for both) but for me and my OOS investing, I find it has worked best to use one person as your agent and PM.

Yes, as pointed out above, some of your assumptions are likely not entirely correct on the true costs, but your methodology of analysis looks pretty solid. 

With the banks, you'll be at the mercy of the appraisers that they hire to evaluate your property, as well as their internal underwriting principalsMulti-family appraisers are going to use both the income approach (strictly NOI/cap rate), blended with a comparable buildings cost per unit methodology.

In other words, the time to research this is now, just as the time to read the airplane pilot's owner's manual is long before you wish to kand the airplane.What most investors would do is to buy subject-to any existing mortgage of record, bringing it current in escrow, and complete their renovation and prepare for rent or resale prior to existing lender/loan servicer becoming alerted to any change of ownership.There are plenty of details, techniques, methodology and best practices that can be learn and employed to make this a repeatable strategy.