Vixen has it right.
What U/K county or US state do you plan to run this in?
Which (of the too few) weekends do you intend to run this on?
What previous events do you have under your belt?
What is your motivation?
As you are a newcomer to this I wish you well, but with the best part of 30 years organising behind me I warn you to step back & think really hard about why you want to do this.
You cannot please all the people all the time, but you can please most of them most of the time & this will bring you many varied feelings from joy to horror, fear, distress , pride etc. etc.
If you go ahead with this then listen to those who have gone before, we are here to help. If you are U/K based then join AFO (association of festival organisers - look it up, if you can't find it them you have fallen at the first hurdle!) you will then meet with the rest of us who have made most of the possible mistakes before you.
I really wish you well with this venture.