Some of the items are helpful for moving day when everything is still in boxes.

Define your development box.  

Many do not expand out of their box.

I would look elsewhere in FL IMHOIn general I tell my clients to always think outside the box for new ideas for amenities etc but no need to reinvent the wheel!

I have one box with costs (both listed and what i would offer).

@Guifre Mora isn't drop box just a file management tool?

@Preston Dean you can always have one in a lock box onsite that you let them have access to if there is a failure. 

Your seller disclosure also looks better when you can check the boxes stating the work was completed with permits when it’s time for resale.  

Just a little wiggly in the box.

They will normally charge you for desk space, using their printer, support from them and their office staff, Etc....Then there are MLS fees, Lock Box fees, Continuing Education costs, and the basic costs of running your own business.