Health coverage after losing my job: marketplace or Medicaid? (Boise)

My employer coverage ended at the end of the month and I am trying to work out what to do as a quality inspector. There are 14 people counting on me, so I am trying to be careful. I think my income this year might qualify for a subsidy. How fast did coverage start?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.