And while there are some very valid points, and no accounting for taste (I'm not an artist), I've actually done what you are contemplating doing.

But having $15k in escrow given back to a wholesaler just seems like it'd leave a bitter taste in any seller's mouth.

Whats respectful, legal, tasteful?

Add tasteful shutters and This would really look good and have a classic charm to it

JK, I now use an adhesive stick after having a glue taste in my mouth for weeks.Honestly, I didn’t track my time as much as I should.

Play around with the spacing until you like the light level, and then order more if you need to.If you're trying to do the real low dough show, at least put in a few more regular round junction boxes, put the classic ceramic lampholder on them, and wire them to the existing light circuit... pull chains or wall switches to taste.  

They're not going to look past lack of curb appeal because they've got a "yuck" taste in their mouth before they even get inside.Anyway, congrats again and it sounds like you learned some lessons that will only help you be more successful.

Without collateral, there is NO interest rate/rate of return that would be suffice for my tastes.

The issue with existing banquet halls is the changing tastes of consumers.

Wow, that is a fantastic job, very impressive for anyone, let alone a first timer; you have great taste!