The lesson
Build the proposal around the buyer's own site, with a labelled aerial that shows every program element in place.
A dark slide shows an aerial rendering with white callout lines: "6 indoor basketball courts (12 volleyball)", "6 indoor pickleball courts", "3 full size baseball/softball hitting tunnels", "18 holes premium miniature golf", "satellite bar", "event pavilion" and more. Labels sit at the ends of lines pointing to each building or lawn, half of them with a count.
Don't copy the facilities themselves. Keep the one-image-plus-callouts format, and draw it on the real site of the buyer you are writing to.