The restriction that makes it more difficult to capitalize on the water savings is that you can't aerate (aka spray) the grey water.

I did do which I recommend if you are taking out walls, the spray foam insulation.

This gives lots of time to move things based upon his/her feedback before any wires are run.We pull all the (new, replacement) wiring, mount all the boxes, etc. with our own folks and call the electrician back when we are ready to hook things into the panel and/or before we start to drywall (if we are using closed cell foam insulation, we'll have the electrician come through before the insulation is sprayed).  

Let's just say that when I first became a believer is when my dog was loose in the neighborhood and when he was jumping into my car it was then that I realized he had just been sprayed by a skunk. 

I looked how to solve this problem in this guide Best result were after using spray with boric acid.

I would cut the grass and spray for pests myself.

In an attic it can be cleaned and sprayed to encapsulate.

Tear off the backing if possible, spray the remaining layer with a garden sprayer full of hot water until it soaks it, then scrape it off.  

A spray bottle to spray it on and a hose to rinse off in 15 minutes works best. 

I know if I was paying an installer, it would be to spray foam.