My building skills are not good. I'm not sure how to go about it. But I'll make it a priority
If your building skills are not great, you may want to think about using dog kennel panels as the base of your run. You would still need to add a hardware cloth apron and run it up the sides a couple feet. You would also want to cover the top with something that hawks, coon and other critters can not get through. That can get expensive depending on how big you want to go, but you can also check Craigslist. I've been watching CL in my area for dog kennel panels as well, but have not found much.
Or, you could hire someone to put the fence in for you, but then you are looking at even more money.