Four examples of oval sandblasted HDU signs for residential communities. These signs range in width from 4 to 8 feet. All are designed for mounting to masonry walls. This is not difficult. We recommend masonry fasteners thru the border. "Tapcon" is a brand that works well, is commonly available, and easy to work with. Touch-up paint will always be included to paint the screw-heads.
These illustrate a good range of color combinations. The two above, and the oak below, feature detailed hand paintings. "Beach Club Villas" has a multi-level effect going on.
A design similar to one of these may work well for your project. Email with requirements for a firm price quote.