Here are some possibilities and these can be altered in any of the elements or modified and interchanged.
Just a thought...you will be a moving billboard and there are only probably 3 bits of information that will be readily retained by other passing vehicles..the other area of importance would be to have more information on the back so that those who sitting behind you at a red light can read your information. The bits of information that are the most important for the reader to retain are your name, and your phone number the design will be second to these and if too much color is added it will make the bits of information to retain difficult.
I used monochromatic colors to unify the design. The pupil in the eye is the silhouette of the home and can be more prominent. Adding the element of a tree branch to indicate the landscaping but the style of illustration can be elaborated or different from this style which is for your slider on 'raw'
I will watch for your comments. Thank you Kind Regards, Teresa