I like to start a new project on bitcoin. My project is creating a web based bitcoin wallet. I planing that to run the bitcoind on single VPS and use RPC for doing wallet operations. I planning that to generate different address for each new users.

My question is

1. My idea is correct or a best practice..??
2. Binance like excahange is generete a single coin address for each coin. I thing Binance is doing to run single node for generate multiple address. Is it correct..??
3. Actually multiple address is equal to multiple wallet on user side...??