Affordable childcare options in Salt Lake City - what worked for you?

I have 16 kids and I need to interview and work without a sitter. I have read a lot of threads here and could not find my exact situation. A neighbour offered help but not every day. Is there an emergency option?

I swapped afternoons with another parent. It took some planning and saved us both money.

Libraries and community centres run free activities that gave me a couple of hours.