Indefinitely and you can't reach the bottom of the page.Currently its difficult to read PMs because it's tough to see where the last message is.

You can use a 1031 exchange to upgrade your rental portfolio and indefinitely defer capital gains taxes on the sale of your relinquished property. 

While you may be able to stretch the time at first, this doesn't work indefinitely to scale (ie what's your next step)If you don't figure out the financing part of the equation (ie your credit etc) then you'll be stuck waiting a LONG time for cash flow to get you to the point where you can do something after this kind of deal....

the gain from the sale of the investment allocation is tax deferred indefinitely.

Like most people here, I agree that you can’t let them stay indefinitely or for free (not a surprising conclusion given this is a real estate investing site).

The effective overall tax liability at sale would be $500,000 + $600,000, or $1.1 million.Another tax benefit of real estate is the ability to defer taxes indefinitely through a 1031 exchange.

But we could work out a deal where she manages the property, I cover all maintenance costs, and receive the income from the second unit for a specified amount of time or indefinitely.

gotta factor it all in.  Definitely

Property management-in case you don't plan on managing on your won indefinitely.  

It defers it indefinitely both on the federal and state level in all states but PA.