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

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

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.

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.

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.

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

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.

Right near the cool old downtown area and good schools and A rated area.