Leverage of course impacts cash flow so if you're nearing the end of your earning life cycle and looking exclusively for cash flow then leverage may not be the way.  

For example the data shows that the mean life cycle of an A/C system is 12.3 years.

I plan on trading up properties within a 20 year span after purchase, so I take the typical approach of a good asphalt shingle knowing that I probably have one re-roof to take on during my life cycle of holding the property.

Here is a link to life cycle information on products.   

Pretty good with the software life cycle but never heard of "Ruby on Rails".

I have a large professional network that comprises every stage of the investment lifecycle, including GC's and Construction supplies at prices that only larger institutions get. 

I ran a life cycle cost analysis and it just makes damn good financial sense.

I'm currently creating a "cheatsheet" for the process of purchasing a new investment.I mean as for the team you need:- agent, inspector, contractor, lawyer etc- steps for finding deals is way to much- but after finding a deal, what to inspect, life-cycle of the deal, estimating the price cost, rehab cost, arv, rent etcThe more I could place on paper it would be better, I'll do it on google docs and share it for the professional comments and suggestion, but I could do that only after 10 posts :)

The question is: where are you in your investor life cycle now?

Apps, and the OSes they run on, have a lifecycle of maybe three years; houses have a lifecycle of 100 years or more.