I am also interested in the approximate price after the coin's exit on the stock exchange. I managed to synchronize the wallet after adding several nodes to the configuration file, without that I could not download the database.
So can you run multiple masternodes on the same server/IP address? Also how many coins can you run off one IP address? I've been trying to find out about that for several days now.
He is talking about addnodes for syncing the blockchain, not masternodes.
To answer your question, most coins allow multiple masternodes per server, but each one needs its own IP address. I usually just use separate VPSs to avoid the confusion and because they are cheap. Also, the wallet with the coins on your personal computer can be linked to as many masternodes as you want (assuming you do the separate collateral wallet setup, which is recommended).