I assume a higher upfront cost as far as land purchase and the actual build but you would have a brand new house, instant equity and hopefully maintenance free for quite a while.

Are you moving into the second one or want to make it a rental property? 

I have a tenant in New Hampshire that I am in the process of evicting.

There are Class A industrial projects underway and the development of a large retailer.

Is there a reason why you are set on a traditional duplex? 

Detroit can be a fantastic market with strong cash flow and good appreciation potential, but it’s definitely a unique place with its own quirks.Starting with cash is a smart move, especially in Detroit, where local knowledge and relationships can make a huge difference.

Within a year we had 3 or 4 originators, 2 or 3 processors, and a full-time admin assistant. 

from my advice rural properties and developments aren't successful and you are climbing an uphill battle. sounds a little niche. we focus on developing and not reinventing the wheel. if this is truly what you want to focus all your time and energy on then visit the closest 5-10 of these that look like the ones you are interested and ask if they'd expand or build a secondary one. do a lot of research before you just take action 

Brandon Turner wrote a book for BP called Investing with Low or No Money Down - start with that.

I have a 10x8 shed that I use exclusively to store real estate materials and supplies.