If you're looking to transact faster than that, then your only option will be private Buyers.Another alternative, other than the ideas mentioned above, might be to sell part of the land into permanent conservation. 

With my last (2 years ago), I had to take an alternative exit strategy to avoid a loss.

In this area, the two soils engineers I've used most often are McDowell and Associates, and Soils and Materials Engineers (SME) - but I don't know if they have branch offices in the area near your problem site.Best of luck with it!

Alternatively, Spaces is another option I use frequently, and it works very well.Regarding the requirements for virtual offices, they are not overly complicated.

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Given the competitiveness in Scottsdale, exploring duplexes or triplexes might be a more feasible alternative to larger multi-family units.

Its return is achieved due to an alternate rent model.  

Last I heard from a friend of a Guru, greater than 95% of those pay $40K plus for these plans, never even open the materials. 

Does that include materials and labor?

The other alternative is to raise capital and be more of a fee developer, at least at the start.