I ended up using bleach water and a sponge mop.

A mixture of bleach , soap and a bit of water , spray all over toilet till it soaks in , repeat and rinse 

I finally decided I will visit each door once a month to change filters, to check for leaks under each sink, to flush the water heater T&P valves, to exercise each shutoff valve inside, and to put bleach down the air con condensate line.My biggest stress came last month in dealing with hurricane Irma as it approach south Florida. 

From the section on Roofing (assuming it's an asphalt shingled roof):"Asphalt roofs will have several key indications when they reach end-of-life:bare spots on the shingles, major discoloration or bleaching of the roof, large number of granules in the gutters, missing shingle and/or curling at the edges of the shingles.....Life Expectancy:Asphalt Singles:  20-30 years."

We had a tenant once use bleach to clean the kitchen floors, not only did she destroy the kitchen flooring, but she also turned the carpet a red color from the foot traffic coming from the kitchen to the front door.

Not to mention they are always in stock and won't end up bleached by the sun.  

Like washing down the stoop with strong bleach, or cleaner? 

They don't lint much, the bleach well and are soft and fluffy. 4 years on those as well.

If you don't mind getting your hands dirty you may be able to remediate a lot of that yourself with either bleach & antimicrobial.

If it went to the subfloor - mop with bleach mixture, let dry; roll on two coats of Kilz and one coat of clear sealer.