It entirely depends on the agency, the area, and how much money you need to live. It also depends on your attitude.
I left a full time job a while back and I’m making out fine so far on Agency, they keep me busy all week, weekend work if I want it, and they pay what they say they will and on time. Though i’m single, I live in a rented room type set up, have no kids to support, I don’t have much interest in material stuff, and my living costs are cheap.
I think attitude goes a long way, and I speak to a lot of guys who work for agencies in the area, and the list of what they won’t do is a long one (no handball, no multi drop, need to be home by 6, no RDC’s, no nights out, etc etc etc) and they wonder why they don’t get any work.
Don’t say “NO” to anything for the first few months, so they learn to take you seriously, then you will become a favourite and get the better work, or at least the first refusal of the better work. Not knowing what you are doing week to week doesn’t suit everyone, and some people simply cannot cope with changing jobs every day. So just make sure you are mentally prepared for it, don’t let it stress you, and just go along for the ride.
Don’t turn up for the jobs with a face like a smacked backside, try smiling, act keen, be enthusiastic, and ask questions. It goes a long way towards whether they will want to invite you back.
If you are prepared for any start times, and any type of work, and don’t smash the motors up, they there is no reason you can’t make a good living working for an agency.