We're either empty-nesters or sharing our homes with our adult kids.

My question is, what do I do with the adult son?

I think its normal to not have every adult on the lease.

That's up to you and what your market can support.Personally, I will not run the application until I have all the supporting documents, an application for each adult that will be residing in the unit, and the payment for the application.

I can't say enough about the Cashflow Game by Robert Kiyosaki... it is a great family game, for adults and kids... the real "Game of Life"!!!

I recently saw a report that adults under 40 are net increasing here in NH, which means that more are moving in than moving out.

This gives us the luxury of time for the screening of tenants and also the ability to help our children start their adult lives a little easier than we had it.  

I have a family of 7, 5 adults and 2 children that wish to rent our rental home.

If property is held in a company, expenses are deducted against the companies revenue.Obviously the taxation discussion is more detailed than this little blurb ... go see your accountant :-)2) Income "sharing" - If the real estate is held in a company, it is easier to have multiple owners of that company (each with their own class of dividend paying shares) which means the retained earnings of the company can be "shared" amongst the various shareholders: ie, a spouse, {adult} children or grandchildren {you need to be careful paying dividends to minor children as the CRA taxes them at a higher rate {search "Kiddie tax"}}.3) Trusts - if your objective is to build a significant real estate holding which you may wish to leave as a legacy to take care of those nine grandchildren, then you will want to consider the possibility of a trust down the road.  

Hey Nicholas,I am not a RE expert, but I have been in sales (one capacity or another) for most of my adult life.