The trinity study back in 1998 is the primary study that ran all the statistical analyses over different time horizons in the market and discovered that withdrawing 4% per year would give you a >95% chance of having sustained income for a 30 year retirement without running out of funds. 

@Gary Parente, It seems to me that your goal is to achieve $120k in predictable, sustainable income each year so that you can retire......yes?!  

My home also sustained significant damage from a tree during a wind storm a few years ago.

If you don’t know the basics, knowing a “program tool” will not be a sustainable way to success.  

One of our longer term goals is to start non profit and create a self-sustainable community for people with special needs :D 

Someone is going to have to lay down a year of profit and I wonder how sustainable that is for your relationship partner.

Additionally, although I can in no way profess to be an expert, I took classes in law school about real estate transactions and finance, and so some parts of the process are not totally foreign to me.In general, I'm fascinated by the prospect of being my own boss and developing a growing side business that could one day independently sustain me and my family.

When you're young, you want to make sure that your money is going to continue to grow and you want more coming in rather than feeding or paying to sustain a property.

Here's a list I found for starters: http://www.missouribotanicalgarden.org/sustainability/sustainability/sustainable-living/at-home/hpwes/for-homeowners/find-a-contractor/st.

I very happily stumbled across this article (linked at bottom) while searching for overlaps between the realty profession and the sustainability movement.