For 18 units for my largest building it’s going to be $40K for running gas lines, 18 heaters, placing the heaters, placing the tank, digging the trench for the line to the tank from the building and reburying it, and having the propane company out to test all the units.

Regardless, make sure your city and neighborhood that you are investing in have different types of STR travel demographics.For example, here in Tampa not only do we have theme park and beach tourism (#5 ranked beaches by TripAdvisor in the world in 2021), we have educational tourism (one of the largest universities - USF and then UT), and also medical tourism (we have some of the best hospitals in the country especially for outpatient services).

LOL #3- pending,  but lots of data- buyer agents steering clients to the largest co-broke commissions. 

They can provide significant exposure due to their popularity.Lands of America: Part of the CoStar Realty Information, Inc. family, this site is dedicated to rural and agricultural properties, including farms, ranches, timberland, and more.LandLeader: This is a marketing and real estate listing service that specializes in high-quality rural, farm, ranch, recreational, and timber properties.Ranch World Ads: Focused specifically on ranch properties, this site can be a good place to list if your property has the infrastructure and potential to be used as a ranch.Each of these websites has its own audience and reach, so you might want to consider listing your property on multiple platforms to maximize exposure.

You need to have all of the money for a down payment personally. Let me be the first to say: That's the farthest thing from the truth.

In the private equity real estate industry, raising money from investors for...

(I.e. driving for dollars)I'm a big proponent of not recreating the wheel.

Largest problem is only 2 elementary schools, one good, one horrible (at least according to rankings info I can find), so it's basically a coin-toss for your kids (I have 1 in elementary, and another that will be in K in 2 years).

He then informed me that our property file was the largest he has ever seen.

Communication is our largest problem at 3 homes at 10 homes it will be way worse. 

@Nathan Gesner gives some really solid advice (although I don't assume your friends are deadbeats;)I'm a huge fan of the house hack, I've successfully executed it 3x now, and it's a tremendous way to start building wealth in RE as it allows you to purchase a home with a very small down payment and, if you execute it well, wipe out what is likely your largest expense (housing), in the same step.Craig Curelop wrote a great book about it - https://store.biggerpockets.com/products/the-house-hacking-s...Check out the forums, podcasts, blogs, etc...