Not familiar with Ubiquity WiFi equipement. Seeking advice

I am attempting to place new WiFi equipment in our office and warehouse space. I also have an adjacent building that has no networking cabling to it. I am looking at deploying a U6 Pro in a central location then U6 Mesh at the rear and side of the main office building and a U6 mesh on the side of the adjacent building closest to the main building. The U6 on the adjacent building would be the only one with no cabling running back to the switch. Does this seem like a reasonable setup or am I missing something? Thank you for any thoughts on this.

https://preview.redd.it/bb8v3ofnh72b1.jpg?width=1169&format=pjpg&auto=webp&s=363b0f52d80786106c2f52862b606090baf3cebf