Now some other investors may believe they can boost your revenue quite a bit but they don't want to pay for that projected boost. 

Maybe concrete single-family 1-4 units depending on the price point and cash flow.Also there is no real MLS in Puerto Rico you need to find an agent for each area you want to look at.

We are not too strapped for cash, but it always seems better to have more in the bank than less.

Not possible, 85% max LTV on a purchase or straight refi, 75% max LTV on a cash out refi.

On property number one, I would cash flow $750 a month after mortgage, taxes, and insurance if I also rent out the unit I live in.

You will make more money on appreciation when you sell your property than you likely will from the monthly cash flow.  

If I have some cash do you recommend clearing the loan or invest instead for next property with proper planning ? 

., Purchase Price: $475,000 ($197.9/sq. ft.).Estimated Market Value: $402,000 ($168/sq. ft.).Financing Terms: 2% interest rate, with a 9-year balloon.Unit B Income: $2,049/month (Section 8 tenant through November 2025).Unit A Income Potential: Similar rent or higher; Section 8 cap for the area is $3,234/month.Monthly Loan Payment (P+I): $1,386.Cash Flow Breakdown (if both units are rented at $2,049/month):Gross Rent: $4,098/month.Vacancy (10%): $410/month.Operating Expenses (37.3%): $1,376/month.Net Cash Flow: $943/month.Key QuestionsWould you be comfortable paying an 18% premium for financing at 2%, especially in a market where current mortgage rates are closer to 7%?

@Thomas Farrellmiscellaneous reactions-BRRRRs won't produce cash flow - they're an equity strategy, not a cash flow strategy-OOS BRRRR on your first deal will be incredibly difficult. 

I'm hesitant to give up my conventional loans on the next cash out refinance for DSCR loans.