Fyi, the discussion went like this, she said I want a wrap around porch, grey siding with white trim, bigger windows, french doors, stainless appliances, black barn doors and shutters, etc., after which I put my foot down hard and said “dark grey or light grey siding?”

Everything in the home will get double usage, especially the appliances.....Also make sure your liability insurance knows that they are now responsible for insuring 6 people.This just sounds like a bad idea to me....

On the other hand, our house has a brand new roof, brand new hot water heater and recently renovated kitchen with newer appliances.

Tenant responsibility for all appliances.

I am assuming you would be paying for materials and replacement appliances, etc... so $1000 per month for labor to take care of 5 mobile homes should be seriously looked at down the road.

I've got a stainless whirlpool appliance package set to go in (no dishwasher due to space unfortunately).

But understand the type of risk could be the exiting tenant having poured cement down the drains, no appliances, no cabinets, a leaking roofs with mold inside the house, no AC,  or squatters having lived in the house with untold 'grossness' being left behind for you.  

The amount you can use for closing costs and rate buy downs is limited, so that leaves you with the majority of the credit for "upgrades," like finishing the landscaping, building a fence, installing sod, a sprinkler system, planting trees, buying appliances and installing blinds, etc. 

Natural cabinets with white appliances and a white Corian countertop.

Replace the glass for them (easy, two screws), or find a door off a used appliance that will work.