We were recently contacted by a real estate developer who desires to purchase a portion of our land(roughly 13'x210', all along the road).

I would say that as long as you are close to major hospitals, universities, company headquarters, airports, tourist attractions, or beaches, you'll generally be pretty safe in getting your desired return.

A desire and ability to share their knowledge4.

I know this is BP but if you can run a business that well and grow revenue consistently; I would think about scaling your service biz to provide the freedom you and your spouse desire.   

It certainly will limit your count but big family could imply that it is not very limiting.I would still recommend avoiding a market were council has made clear their desire to eliminate non owner occupied STRs.  

Then weight the pros and cons of each market. 

Plenty of people still moving here with record low unemployment means wages will rise and the increase in rates is not having the desired affect in our neighborhood.   

It's definitely a flawed comp method on it's own but if buyers and sellers put weight on it, then it needs to be considered.  

Yes, it may be less desirable to live there, but you'd have to weigh all the factors and pros and cons in reaching a final decision.For example, I live and invest in the Capital Region of New York.

Now, that doesn't guarantee the qualified use will be met but it at least holds much more weight.