Here are some steps and resources that may help you confirm your numbers and conduct due diligence:Rental Income Analysis: To determine the possible rental income for your duplex, look up the rental rates for nearby homes that are comparable to yours.

Rates are too high, so borrowing costs are high.

HMLs offer quick funding, but keep in mind the higher interest rates (8% to 18%) and shorter repayment terms (6-18 months).

As far as a general STR strategy, a nice 3x2 house within an hour of a major attraction is not too much to manage and can drive a nice nightly rate if you go with high end design. 

Just a quick follow up to @Christie Gahan's comment: ** Yes, Long term capital gains are taxed at lower rates, but it isn't as simple as the first $500K of gains are taxed at 15% -- rather, the 15% bracket will account for your total income from all sources. 

@Yael FuerstIf they are rentals you could get a DSCR loan.If the loan you get is lower interest rate than the current loan amount then it makes sense to do thatFor example if your debt is 10% and a DSCR loan is 7%, then pay the lower interestHope that makes sense

Recognize market trends, rental rates, and property prices.

Prime Location: Waterfront properties offer unparalleled views and access to recreational activities, making them highly desirable for vacationers.Strong Rental Demand: With the rise of vacation rental platforms, waterfront condos often experience high occupancy rates and attractive rental income potential.Appreciation Potential: Waterfront real estate tends to hold its value well over time, offering the potential for long-term appreciation.Vacation Rental Income Strategies:Marketing Tactics: How do you attract and retain vacation renters for your waterfront condo?

Their labor rates are way below market rates so don't expect any big name established company to show up. 

Do I say: "The 300$ discount will last till the end of the next week and if you dont sign the lease the rent will be without the discount?