Always keep an eye on interest rates to optimize cash flow and return on equity. if you switch to long term hold investing, you'll want to see if equity stripping is a strategy that works for you. 

@Nick Am Setting up a management S-Corp (LLC-B) to manage properties owned by your LLC (LLC-A) can provide tax benefits like retirement contributions, payroll tax optimization, and deductible expenses (e.g., home office, health insurance).

Focus on optimizing the current fourplexes (improving rents, reducing expenses).

Does this matter if you're not optimizing for building a ton of wealth to pass onto kids? 

I am also looking for tax optimization as the business will require cash reserves and is a high risk business from a liability perspective.

Before committing to paying off the property, analyze whether there are ways to optimize revenue, such as better marketing, adjusting pricing, or upgrading the property to attract higher-end guests.Return on Capital: If you pay off the mortgage, the “return” is essentially the 7% interest you’re saving.

A real estate tax pro  can help optimize deductions, ensure compliance, and avoid costly mistakes most importantly so that would be the next step 

Even with the discount, the investor will be a life style investor who wants to own in PR more than optimize return.  

Just my opinion but I think 2 years is too soon to consider exiting deals (minimal appreciation and less than optimal use of depreciation). 

In other words, I'd hope to pay market price to rent the place out so the home buyers can get an optimal but realistic return on their investment.So my goal to make this appealing to me, as a potential renter, is to also be one of the buyers.