I would not open separate accounts for each owner.

Additional prior to move-in deposits: Cleaning Deposit $400.

Windows should be washed, but use your own judgement-if you were moving into the house and saw the windows would you be happy or not.

It is unfortunately rare to find someone with that skill set,  Can I ask what's your go to marketing move? 

There are properties you can find that might already have an ADU or a layout that would allow a unit to be split off with a separate entrance (ex: converted garage). 

(edited)This will affect investors with separate metering for little used units or devices like pumps or EV charging.... even if you have excess solar generation or whatever the bill charges will still apply. 

My husband and I were legally separated when I bought the home and had since reconciled and ended up with two houses.

Our plan is to rent out our current home, which we own, once we move into our new house. 

1031 into a property, rent it for a year or so, then move in. 

@John Dehn I like your idea of offering it as a closing credit, even if you aren't responsible for the charges, if you want them to buy the property that could be a good incentive to move forward with the purchase, it may seem insignificant relative to the purchase price, but small psychological things like that can have an impact on people's decision making.