Quote from @Mary Peale: May I ask which amenities you added that you believe contributed to a revenue boost? 

THEN, I plan to purchase the second home using a FHA or conventional loan (3%-5% down), for which I will likely pay the monthly cost out-of-pocket, maybe with some rental income support if it is a duplex.My concern is, I do not want to spend my savings or weigh down my debt-to-income ratio so much so that I cannot qualify for and pay the down payment and closing for the lending on the second home.Questions: - With the first home being multi-family, 75% of the rental income (or potential rental income initially) will relatively either maintain or boost my debt-to-income ratio from lenders' perspectives, right? 

The key is to offer something different to the other homes, and be an attentive host, to get good reviews to boost OTA (Airbnb/vrbo) rankings. 

@Mario Morales, to echo Bradley, I would say this depends on what you are lacking in your own knowledge base.To some (probably many investors) the agent is simply an initial filter for them.  

Or we gradually perform high-quality updates for a live-in flip, then roll the equity into a new home.Regarding rental income, we aim to boost income, lower our effective tax rate by generating more low tax-drag income with rental income (since there’s not much we can do to lower out W2 tax bills) and have retirement cash flow.To compare the financial impact over 10-20 years, we want to analyze renting versus flipping.

BUT then, the tenant complained that they were paying for the credit boosting feature in RentRedi and would not be getting their credit-benefit if the other tenant didn't pay on time. 

Also, check out if there’s any new development or improvements happening nearby, as that can boost property values.

This influx of high-paying jobs (averaging $60 per hour) is expected to draw a significant number of professionals to the area, boosting demand for housing and various services.

These can boost property appeal and command higher rents.- Short-Term Rentals in Non-Traditional Markets: Secondary markets like Florence, Alabama, are ideal for short-term rentals.

A client of mine in Maryland added smart home features to their rentals and boosted rents by 12% with minimal investment.