Estimated time: 16 weeks or less. 

Yes, there are wholesellers in Oklahoma, not all of them are good, probably more than half of them don't even know what they are doing, but you will have better chances to find a good wholesaler here in BP than anywhere else. so yeah check out Tyler Weinrich like Zack mentioned before.

Once you get it under contract, to market it, present your estimate of FMV, market rents, and repairs needed. 

So firstly, we are wondering what to estimate construction costs for a duplex on each lot.

If you house hacked and lived in one side and rented the other after 2-3 years if you paid down some more of the equity you would have a better chance of then getting conventional financing and buy out the CFD.

I got 3 estimates and had them agree to the best one. 

Value = NOI/CAP.If possible, base your numbers/offer on the T12/T24/T36 (the actual trailing 12/24/26 month financial statements) rather than any estimate or projected pro-forma they provide you - be insistent that they provide you with the T12/24/36 so that you can run numbers yourself.

I am currently in South Florida and I have a background in construction and estimating. 

I think after you get a chance to research what it is and how it can help grow your portfolio investment, you will be interested.

My recommendation, try to figure out how to finance a property from the auction, AND line up a financing option in case you come across something from the MLS or FISBO.More options and hopefully that will translate to more chances of success.