The most important thing to keep in mind when working with a horse that's hard to catch is he has a reason for wanting to avoid being caught. It doesn't matter what his reason is. What matters is to work consistently and systematically to change his mind. This is a training problem, not a horse deliberately being 'bad.'
This catching exercise should always be done with no time constraints. It's important not to think of success or failure in terms of how long this takes. It might take almost no time one day and two hours another. When applied with time, patience, and consistency, this method will always work. Over time, it will produce a horse that's easy to catch, and will often come to you.
In the photos below, we work with two difficult to catch horses.
Horses learn through repetition, and people learn through repetition, and yet so often people fail to be consistent with their horses.
Horses can be a black hole as far as money is concerned. With the way the expenses can add up, it can be easy to want to take a frugal approach to gear. But there are a few things we feel are worth their weight in gold as far as horse longevity and handling go. Natural materials (leather, wood, rawhide, wool) can be kept clean and cared for so they will last for years and years. Well-made tack and gear are a big cost up front, but in the long run can work out to less cost over the course of a lifetime because they don't break down or lead to vet bills.
It's easy to lose track of things while you're riding. It's easy to focus on problems, or cultivate new skills. And yet, horse learn through repetition, so the only way to ensure they learn something and remember it is to practice it all the time.