I highly recommend Life Cycle Property Management. 

However, even with that being the case when the tree nears the end of its life cycle you'll definitely want it to come down on YOUR terms rather than its own :)

I’d like to set the stage with this overview post.In order to build a diversified real estate business, it’s important to step back and look at the real estate life cycle.

This is due to the way REIT dividends are taxed as ordinary income as opposed to capital gains, this makes them a prime consideration for a Roth account and will almost guaranteed significantly outperform the broad S&P500 over an investors lifecycle.  

None of the investors are listed on title.The life cycle of my opportunities are 3 to 5 year holds and generally the exit is a sale, but I have multiple exit strategies such as a refi or cash out refi to the investor.

I have developed a couple entirely autonomous programs that  manage specific marketing/advertising life cycles.   

First you have to fully understand the math on your investment over it's life cycle.

@Dustin AwtreyIt's hard to give a rule of thumb for rental real estate because ROI and effective tax rate are generally measured over a life cycle rather than each year like W-2 income.Unless you provide 'substantial services' with your rental (aka hotel-like services), the rental activity won't be subject to SE taxes, which is a strong positive...Some properties produce tax loss from year to year, some properties produce tax income.Some people are 'real estate professionals' who can use that tax loss to offset other sources of income, some aren't.Rule of thumb: no rule of thumb, work with your tax CPA/EA.

Each major system has an expected life cycle.  

AS for the goal of how much one would need to comfortably live on.. that in my mind has a lot of moving parts.. it all depends on where you live.. where you are in the your life cycle..