Ultimately, forming connections with local investors can be a game changer, providing you with the mentorship and support you need to thrive in unfamiliar markets.

Start by reading the Ultimate Real Estate Investing Guide: https://www.biggerpockets.com/guides/ultimate-real-estate-investing-guide/introduction2.

Eco-conscious renters are drawn to sustainable living options, and promoting the long-term energy savings and reduced carbon footprint can set your rental apart, making it more appealing to premium tenants.

However, ultimately, the decision to keep or sell the property depends on your personal preferences and financial goals.Reasons to keep the fourplex:Established cash flow: You mentioned the property will cash flow around $675/month now and $1000/month when paid off in 7 years.

There are certain individuals that are in your face selling their products/training and it has caused a negative reaction on Bigger Pockets if certain individuals were promoting Sub2.

Honestly, which would you say is the ultimate challenge you face as an STR owner today?

Just about anyone can get on this site and promote their services.

I had a whole incubator program I called "0-Hero" where I would train a person in everything, literally everything, from 0, and promoted best part was no buyer-list needed or struggle to find $ because that was me, done, ready to go just do the steps. 

Right now, I have 100k to invest, 17k in reserves, 40k in retirement and I can realistically save 30k a year in my current position (60k/yr when I am promoted in a year or two)Back to the discussion topic.

Here are a few I recommend: "Rich Dad, Poor Dad" by Roberto Kiyosaki; "Set for Life" by Scott Trench; "The Unofficial Guide to Real Estate Investing" by Spencer; "The BiggerPockets Ultimate Beginners Guide" found here on BP; "The Book on Rental Property Investing" by Brandon Tuner.