Bluetooth mesh setup

Hey, I am trying to get a bluetooth mesh up and running with the nrf52832 dev boards (PCA10040) acting as nodes and a Raspberry Pi 3 (with bluez meshctl) as the provisioner. I am succesfully able to run the light_client_server example in the Mesh SDK. I have a couple of queries - 

1. I have a requirement of around 10k nodes. The nodes will need to transmit sensor data at periodic intervals to the provisioner. Is this feasible with a single provisioner? If not, what would be an ideal configuration for this scenario? 

2. How would I send periodic advertisement packets (for reading the RSSI value) to the provisioner across the mesh? And once received, how would I read the data on the raspberry pi?