So, I had a local shop make her several home decor items, and one of them was a nice mug that read, "Mike can fix that".

Do you have a floor & Decor location there locally ? 

They can quote the by-laws by song and verse... be it the decoration you tenant hung on the door, or the tenant's inoperative car, or noise violations, etc, etc.I would definitely check into the rules of the HOA.  

Utilities, taxes (property, local vacation, & income), landscaping, furnishing / decorations / amenities, pest control, & supplies (soap, TP, etc) are the big ones on my STR calculator that you didn't mention.I'd also recommend using the enemy method to determine expected income.

We negotiated the furniture in the price and used some of our older furniture to update the decor.

In a saturated market with high traffic, the play is to create properties that are decorated and themed extremely well so they will pop out online.

Look for something neutral that goes with any type of decor.

As for design, I have hired an interior decorator who will be drawing up 5 different color schemes, tiles etc, and I will choose one , this specific designer has worked on 5 homes in this area that sold for 1.9 million , so she and her team know what people are looking for in this area.

that prompted the discussion.I see a trend on tiKtok where people decorate entire walls with trim, form, LED lights etc and we try to make it clear at move-in that all modifications require approval and the property has to be returned in essentially the same condition as originally provided to them

In Orlando, you have the opportunity to drive appreciation by buying a poorly performing, underdecorated STR at and drive appreciation by transforming it to a highly themed, well decorated property which books well.