This really isn't a question of what's the "best" way to invest, it's more what works well for you, your resources and lifestyle. 

By making targeted upgrades and ensuring the property was well-maintained, I was able to enhance its appeal to prospective tenants, thereby increasing occupancy rates and rental income.

I do NOT owe anyone who made other choices any part of my lifestyle I EARNED!

If you have a high rent and no rent control, without knowing anything else about your financial situation, lifestyle etc. 

We invested $30,000 in strategic renovations, enhancing the property's appeal and market value.

Have you tried out the board for submitting enhancement requests yet? 

We might consider the lifestyle aspect if it's a place where we want to go back regularly.Speaking of Mexican cartels, I've been going to Mexico for more than 20 years, know a huge number of people who invest and work in real estate across the country and I've never heard about cartels taking over properties.

Providing beach chairs, umbrellas, and a cooler can enhance the guest experience and contribute to glowing reviews if your property is near the beach.

Do the math with local rents and call different property managers to determine if the numbers work then consider your lifestyle and college schedule.

This strategy can enhance your investment portfolio without depleting your savings.