Of course there will still be other expenses (taxes, insurance, repairs, utilities), but this is a viable strategy.

The utilities are a ballpark estimate from online data. 

Will they lend to a park that has majority park owned homes and private utilities?

I've also used the assessor website to find all out of state owners assuming they are rentals for specific neighborhoods I target for either property management or if they want to sell to me.Depending on your area and which MLS system is utilized, Realtors can potentially get other specific lists.

You shouldn't have any utility costs on SFH.

I know that the startup costs would be much higher than a traditional SFR rental as I would have to pay for appliances, all utilities, etc... however, would this be considered a Non-Profit Organization (NPO) that could qualify for government grants? 

Without going into the specifics, you’d be right to be hesitant to purchase a property utilizing a contract for deed.

If I split utilities I would then have another $72/mo for that.

The reason being is that it is consistent, not based on usage like a utility and you would still need to pay it even if nobody was living there.

For example, there's a double on the market right now for 125k that has comps worth 400k but it needs everything with no utilities on.