Such as no dog over 20 pounds adult weight.

In our market 3 is the ideal number. 4 bedrooms often attract groups of adults that are looking to rent hack.

I had planned to bequeath my 1/2 of the property to my adult son but would like to gift it to him sooner rather than later using the estate tax exemption.

All adult parties to the agreement are required to meet at my office, together, so that I can review all of the Rental docs with them.

Its a relief to now that the work will always be there where I left it, but the reason (my family) will grow older and before I know it, they'll be adults.

You should know your lease inside out and should have enforced it upon discovery.You also shouldn't allow any additional adults to move in without being screened first.

I don't know how they could provide that level of detail on an entire "household" with three adults.

Tell them the adult child needs to find his own place to live.As for the septic damage, how often does it normally require pumping and did the damage occur because it was due to be pumped or because someone put something in it that they shouldn't have? 

I always have all adults on the lease and make it clear that all of them are individually responsible for all the rent. 

I would absolutely get an application filled out for all adults and run the appropriate background checks.