Arielle, I think the bat brings a positive message to you and even better, to your husband as well!
The five elements reflect nature and feng shui is about living in harmony with nature. As you are practicing feng shui, you are transforming energy and it sounds like you are making a positive difference. I have a book called Animal Spirit Guides by Steven D. Farmer and it says if a Bat shows up, it means:
"Let go of those habits and attachments that no longer serve you, and welcome the changes that are long overdue . . . It's time to confront and conquer your fears, trusting that doing so will bring about dramatic and beneficial changes . . ."
So have you and your husband been mulling over something recently? Perhaps even the openness to and belief in the power of feng shui may be part of it. I think it's great both of you saw the bat because that reinforces the partnership aspect, in my humble opinion. And, look at your positive reaction to the bat -- outstanding!
All the best....Shirley
