So, the same store owner just messaged me on Facebook again and said this:

"considering this business is zoned for retail I would be highly skeptical of anyone claiming it to be an office space. I would be wary if I were you."

What she is saying makes sense because if you use Google Maps and look at Main Street in Grand Bend, Ontario, you will see that all those stores are retail stores. There are no office spaces anywhere on that street.