There is a thing called jobs that you can do in era. Not that hard  and it takes less than a month to get 7.5k |
Problem with that is you make nearly a slave wage with era jobs. There needs to be a job that can get 10k/hour
Ill take two of those and breed those. Then once i get enough slaughter 1 out of every 3 births. Ima get a sheit ton of heals