You can hire a high school or college student looking for summer work to do it. 

I haven't done business with Eddie so can't say anything but the one full-day workshop I attended was up-selling of 3-day workshop and note school conference.

Some of the top rated schools, downtowns, neighborhood, and safety ratings in the North East.

Usually the Veteran is using the "Change of Life" circumstance which means they are moving out of state, closer to work, school, or moving into a bigger home for increased family, out of a multifamily into a SFR, it also applies to retirees or disabilty if moving out of a larger home and into a smaller one due to up keep or mibility.Most VA loans have an assumption clause as well.

They have 529s to use to pay their living expenses and school tuition. 

They don't want to worry about getting hassled or ousted mid way through a school year for example.

8- what can a teenager do before graduating high school and wants to invest?

The "house hacking" you CAN do is with your GI Bill: GI Bill BAH is based on the zip code of your school, not based on where you live.

I posted on FB that I was going to start buying rental property and this guy reached out to me from high school and said he had a property he had been trying to sell.

Not saying all but a big percentage.50 to 60 year olds might have a cell phone and be on the computer30 to 40 year old familiar with zoom meetings, texting, cell phone, computerskids to 20 year olds embracing group text, videos, all emerging technology etc.Of course this is not an absolute but in general as the age goes up the use of technology goes down.I could retire today if I wanted to and live off of the money the rest of my life. 48 years old now.Any industry out there has a certain golden age run up where those get in with the right timing and determination can do something magical.