Mesh protocol for 120 ESP32 devices.

Let suppose we want 120 esp32 in a mesh structure. Every node (ESP32) has a distance of 4 meters each other. The longest distance (node) is 150 meters from our PC. The physical structure of the devices is in 4-5 lines of 25-30 nodes for example. In our PC I want to have a webpage where I can see for each node its button state: we press a momentary button in the node, the particular box (CSS) becomes green, we press again becomes red. All the senders (120 EPS32 devices-nodes) work in deep sleep mode when their button is not pressed. Even the page is closed, when we open it back again, the data is preserved (running PHP-mySQL).

I want to ask if such a project is possible to be done, secondly we need a router (internet) ? Also how reliable could be? Do we need Lora or the ESP32 WiFi feature is reliable enough given a mesh structure (obviously chain mesh structure). Please, only freelancers with experience in such projects (esp32, Lora, mesh network)