My income is $140k gross (software engineer), my wife currently stays at home with our child, but could go bring in $30k-$40k if needed.My question is if we put the $150k down (with $100k via a HELOC), rent out the back, and do some airbnb ($100-$150 in the area) with the extra rooms in the main house.   

There was a second, smaller building craze at the end of WWII that ended shortly thereafter in the 1950s.You should be prepared for more work rather than less.

I have a child going on 2 years old and feel like I am missing out on a lot of moments due to working in my current profession.

The police have contacted her mother who drove through the night to get here from out of state to pick up my tenant's 9 year old child. 

However I know of a property that might help, please give me your honest Opinion.In my home town there is a house that has sat empty since I was a child (15 years so far). 

It seems they sensationalize the pits being the bad guys on  the news if a child is hurt..

I do not want more than 4 in this unit, but would not be surprised at all if more family moved in or they had another child. 

Assign individual properties to each child.

What process does a parent have to go through to have a adult child leave if the person refuses to leave?

For example, weekly tips like paying your child up to X dollars per year for job site work (ie: post construction cleaning) before they will get taxed on that income, which ultimately helps you, the business owner, by reducing your taxable earnings.Thanks!