go watch some other ones first. Maybe he just doesn't care to elaborate too much on the phone because he's had a thousand people call him in the past wanting an evaluation over the phone. It happens. It's normal to have questions, but I can't blame some people when they get burned out sometimes.
People have a thousand questions on the phone about schutzhund all we really say is bring them out and we'll see if they have drive. They want a 30 minute explanation about what that means, and really I don't have time to explain it to every person that calls. I have my own dogs, others to train, a "regular" job, work on the house, football games to get to, whatever. the person will learn more if they show up anyway, and if some are turned off by it, so be it.
I only have so much time and if they don't want to "waste" any time to come out just to see what its like, odds are they probably wouldn't stick with it for longer than a couple weeks anyway. I don't have time for that.
so yeah, ask if you can come without a dog and watch. you spend some time, save the money and see what's involved. Maybe a learn a bit. If all he does is let people walk by his sheep on a leash for a hundred bucks, move along.