You could stencil the house number one of the stair risers leading up to the porch. Have a sign made that you keep in your lawn, mount one on the corner to the right of the bay window.
I would look at the house from several different angles as I drive to it and see what spot catches my eye first. Then use that area for the house number. You can also draw attention to it by having a colorful plant or something to draw people's eyes. You want it visible by emergency personnel.
Here are some ideas.
Q