I watched a video on the SQ4D company that legally built a 3D Printed house (selling for $300k in an average $550k market) just recently in Long Island, NY and they are getting better at tackling the plumbing, electrical, and making it custom made. 

List it for sale now while you work the bugs out.

You need licensed contractors and permits for electrical, plumbing and for major things, someone who knows how to put a roof on and address foundation issues.

You need sewer, water, electric, fiber optics, sidewalks, fire hydrants, storm ponds?

learn everything you can about electrical/plumbing/gas/HVAC.

(we're no longer in touch or else I'd introduce you) He'd get all the water, sewer, and electrical lined in, do all of the streets and frontage, then sell the project to a track builder to handle the rest.

If you ever have Electrical Engineering questions, I'd be more than happy to help.When investing in a leveraged property with a ROTH SDIRA, I am subject to UBIT and UDFI.

also if you are going to put yourself out there as a handyman, you had better have an extensive knowledge base,  and know the limitations, I.E. what you can and cant do when it comes to electrical, Plumbing , ect.  

Here are some details: Top bottom duplex Purchase price 440kTurnkeyDownpayment - 55k Both units vacant2/1 upstairs - $1500 market rent (long term)3/2 downstairs - $2500 market rent (long term)Newly renovated Central ACSeparate electric meter 1 water meterInterest only payment for 5 years - $2567/monthTax - $500/month (appox)Insurance - $150/month (approx) Cash flow - $391 (after taking into account vacancy, property management, maintenance and capex reserve)ROI - 8.5%No prepayment penalty If used as Airbnb, ROI can be higher

Non-traditional credit that I have used before is gas bill, electrical bill, gym membership, phone bill, magazine/newspaper, really anything with a monthly payment that can show paid on time.