I set up a website where people can donate API calls.
The init command can fetch the info of 100 accounts per call. One account can make 60 calls per hour. It takes about two days to get the info of the accounts.
The fetch command is limited to 5000 following IDs. Accounts that follow more than 5000 people are ignored. For all other accounts there is one call needed. Again 60 calls per hour are available. Would take six months doing it alone. Or 4 days with 50 people helping.