Should he be exposed to all liabilities that comes with it such as lawsuit, history of insurance claims(I believe insurance have a data base of past claims that can affect future coverage), credit and what not at an early age? 

Build your database and clients.

He wrote a code using google sheets and then he goes to extensions and App Script.

Don't rely on Zillow's app.

As a Canadian it has some restrictions like a lack of mobile browser/app support outside the US, but I'm sure for an American it would be great.

You'll still get people who respond with "STOP" or "UNSUBSCRIBE", but you will get a large number of people who say "NO' or "PASS".You still want to remove these contacts manually from your database to prevent them from inadvertently being messaged again. 

We have a huge group of all sorts of investors in our database, so you can share it with us if you'd like to better your off-market sale. 

In return I can share my lease forms and rental apps if you want. 

You can  solve this by a cash app refinance if you’d like to readjust title, this is the way you would take care of it.

Most folks have their own TV apps these days - Netflix, Peacock, YouTubeTV, etc.