The fact that 8 acres were developed and 200 were left as farm is a clue there is some issue.Another first step would be to determine the possible economics of the development.

BP has calculators to help you determine cap rates and values. 

RE is a get rich slow game and there are increasing number of people talking about how difficult it is to retire from your day job even with large numbers of rentals because cash flow is thin.On the one hand there is the Small But Mighty portfolio mentality which I believe is a book in the BP store by Chad Carson.

I would not rent out the space as a separate unit but I am trying to determine if I can legally duplex the first floor and garden level units to create more living space (there is already a stairwell that could be used).  

The value will be determined by an appraiser hired by the lender.

I recommend you really study your market to determine the appropriate rent rate, then market yours 5-10% below the competition for a six-month lease.

However, the one constant in these emails is a request for the broker fee co-op and determining the offered co-op fee seems to be the motivation behind these emails.

This piece will also help you determine what you can afford and cash flow. 

A good agent will ask about your ROI & cashflow, then help you work backwards to determine an offer price to make your numbers work.

Work directly with on-site Construction Project Manager to insure project construction is per plans and specifications from start to finishProvide supervision of sub-contractors on project siteAssist to ensure construction activities move according to pre-determined scheduleCommunicate effectively with SubcontractorsDaily inspections and presence on project siteIdentify any project design and construction issues and bring to management team.Oversee and report progress of project against project plan scheduleCoordination with Construction Project Manager, all necessary work flow schedules and monitoring of same to insure all deadlines are metInform Management Team of work progress and of all significant matters relating to the projectDevelop strategies to promote efficient and cost-effective work practicesAbility to step into and perform duties on an existing under construction multi-family project.Recommendations will be required.Thank you,Anat