And BP allowed us at their conference to be the selected Charity ..

You should not have allowed access and now you are going to live the old adage of "it's easier to give slack later than to real it in." 

Higher percent down though might actually help slightly reduce the interest rate for you, but also allow you to keep some of your cash as well for other potential deals.  

I just want to make it work as renting the house will allow me to still save some money.Anyone have similar experience or any tips would be greatly appreciated.

That would allow you to dock their security deposit more than just for the prorated rent for those few days.

This allows us priority housing when they search for a home fit for their clients. 

Additionally, you might want to consider an FHA loan for the duplex if you plan to live in one unit, as it requires a lower down payment and could still allow for a good return on investment.

This method allows them to rehab multiple properties at the same time then the construction contractor sells them at market value to a buyer.

Greenville SC allows density exceptions for hotel to multifamily conversions that have 20% of the units used as affordable housing for at least 25 years, or 30% of the units as affordable housing for at least 20 years.

It allows you to check out the area. 2.