My roof water leak test could not reproduce the leak albeit the amount of water from a garden hose can't compare to a major rainfall. 

I struggle with frustrating them when they are so very good, they are planting gardens in the front yard. 

@Stuart Udis multiple charges including water, sewer and storm water.I have charged separately in the past then they grumble when one uses lots of water gardening or whatever.Have a vacancy coming up which is rare and an opportunity to improve the place wherever needed.

Pic attached  Home Depot sells Concrobium Mold Control.  

It is hard to justify an expense that would eat up all of a majority of your cash-flow.An investor doesn't necessarily need 'any' professional but it really depends on your knowledge/amount of time you have.For example, technically, most people may not need a painter as the tools are available to them in Home Depot or most stores.

Rehab with the help of my family - Re landscape garden, painted inside, re grouted bathroom tiling etc.

Rehab wasn't too strenuous and i did myself with the help of my family - Re landscape garden, painted inside, re grouted bathroom tiling etc to freshen up.

What about one of those 10 x 10 Home Depot storage barns?

Per my door contractor Home Depot and Lowe's have the best pricing on entry doors because of the sheer volume they do each year.

Reston Virginia, the first master-planned community in the United States founded in 1964, is a Garden City about 20 miles outside of Downtown Washington D.C., which was recently added to the Washington D.C.