Put up the cures on/in the property. Looks like you will be picking up a few windchimes which can be hung outside the house or in. Place in your rental agreement that the chimes stay up, that the front door area stays non cluttered, and work some form of blue into the master bedroom as well as something on the metalic-color range in the southeast.
If they ask tell them - what's good for you is good for them. You wnat them to be prosperous as well as illness, disater, and disease-free.
and then mention that it would be to their benefit to have that light in the center of the house on at least 4 hours during the day.
Much Love, Shawn