Quote from @Bryan Adams: @Ken M Well the whole point of my question was if there is any advantages to have a RE license# , like is there  any specific software or website that only agents can use ,like there was one  (realtracs.net) that I had a friend who let me borrow his license number and ID to log in to the website to get the area comp and much more detail info that I was not able to get it as a non-Agent.I hope this makes sense and did not complicated my initial question.Your friend would lose his or her license in one second for doing that.

Anyone going to craigslist must be a little desperate and so that is an awesome resource for cash buyersGet a pro membership here on Biggerpockets and you can start posting deals on market place.Get BOTH a motivated seller website AND a cash buyers website going, rank it #1 and cash buyers are constantly messaging you if you have a deal available.

Over time, that house has filled up with five working adults, which caused the rent to increase quite a bit.

They have hired a great real estate agent and tied her hands by giving her a dead website to work with, minimal marketing for the project. 

Quote from @Collin Hays: Assuming that your property has its own website whereby guests can rent directly...Name your cabin, and name it something unique and unusual.

While your kids are too young to be employees, you could still set up investment or custodial accounts (like a UTMA or UGMA) and fund them with some of your after-tax rental income, which can grow tax-free until they’re adults.

For my entire adult life, I’ve focused on wealth accumulation. 

Google "Websites that I can advertise for FREE on".

Plus, I'm getting my adult kids into the house hacking.

They may charge you (at your age, I would not suggest paying for a mentor), or they may expect you to work for them for little or no money...if they expect you to work for them, they usually will want you to bring some proven experience and skills to the table that will benefit them--but at 19, most people don't have much experience to offer (that's not your fault, it's just an inherent part of being a young adult)....but don't worry, because even if you could find a mentor right now, a mentor might not even be the best use of your time at this stage...In some cases, a mentor might actually get in the way of your success (especially if your mentor isn't well-matched to your style, interests, goals, etc).