Any tips on how to create a welcoming and appealing environment for these potential tenants?

Along with what's already been said, I would use a professional photographer to really showcase the spaces so Guest can envision themselves playing bocce ball, lounging outside, etc. 

However, I'm new to this and unsure of the best way to structure a deal like this such that it would be appealing and a "heck yes!"

I just use CMA's from my realtor to appeal.

That might have gone down for a whole host of reasons but it usually decreases when the owner appeals the value based on condition, a recent sale or appraisal, etc.

We purchased the property for $21,000, invested $25,000 in renovations to modernize and enhance its appeal, and sold it for $55,500 on 03/29/2022.

She's picking pretty expensive places to live though so not as appealing as your deal! 

It's a magnet for both tourists and business travelers.Brickell: A luxurious enclave known for attracting affluent visitors and business travelers.Midtown: A vibrant, upcoming area appealing to younger travelers seeking a mix of local culture, shopping, and dining.Given your budget and the goal of purchasing two condos, investing in a combination of these areas could optimize both appreciation and rental income.

It seems hard to find any property these days that will meet the 1% cash flow rule in the US, so financing at 6-7% and not cash flowing doesn't appeal to us as a strategy - but is there something we're missing here where we should definitely lever up?

We might sell if the rental market doesn't pan out—so curb appeal is important.