Another approach would be to get a civil engineer to look at the site with you as they are familiar with most costs involved in sub-division and may be best suited to answer  your question.

They have a property management division also.  

I have a unique model in the house in the Bronx that is a furnished co-live-work space for entrepreneurs in which I include services like linens, coffee/tea, community manager, etc and for which I'm able to collect rents that are approximately 2x the area rents.  

Each situation is unique.

Or if you know anything unique about the twin cities area, please share.

These are probably unique to me, so take them with a grain of salt.I really didn't want to have to disclose my status as an agent in my marketing or transactions.  

I'm in a very unique crossroads in life with unlimited potential and need only apply myself.

Any waiver by a buyer of this provision is contrary to publicpolicy and thus unenforceable and void but would not affect the validity of the remainderof the contract.SECURITY AGREEMENTSPERSONAL PROPERTY SECURED TRANSACTIONSUNIFORM COMMERCIAL CODE - DIVISION 9Agents in real estate transactions involving both personal and real property must befamiliar with the transfer and encumbrance of personal property.

I was thinking that the biggest spenders would probably want something that is unique to them, but if I was building in a neighborhood with comps around 1.5m, would it be okay to go with a popular designer instead of having to finding an end-buyer at the beginning and designing the house with them?  

Taken directly from the listing "Unique one of a kind finishing completed by a professional!"