That location has a problem similar to Heath's Supermarket in that it cannot be seen from Route 25. For a retail biz, good visibility is important, just look at what the Meredith Hannaford's has for high visibility signs.
What with all the work it takes to start a new store, maybe you want to replace the existing sign underneath the Irving Gas with something that is more identifiable. 3M makes vinyl sign material that is highly light reflective that could take advantage of sunlight, and vehicle headlights to make a much more 'easy-to-see' sign.
Maybe you want to shoot off a roll of 24 color photos of your existing sign from the same location at different times & days and then go consult with one of the local sign makers: Omni Signs or Paquette Signs.
In retail, people buy with their eyes, and good signs are real important. At least, good signs sure help to get them in the door for their first visit.
Just my two dollars worth of advice that wasn't requested
Good luck with all your hard work in building a new store.