I agree, I just checked out the website and it shows a pole bending horse, so it's a safe assumption that they train in games, but doesn't show anything else hinting at what they train in.I'm going to pretend I'm a potential client. I visit your website and this is my conclusion: You need to have more information on your website. It says "4 different services" but doesn't go into detail what exactly those services are. What training are you offering? What training do you have? Do you still train with someone? What level are the horses you have trained at now? As a client, I'm going to want to see what results you've had in the past before I dive in and send you a horse. I wouldn't worry about your age at all, you will find bias throughout the horse world for many different reasons. Your best bet is just to do your thing and keep your chin up! Good luck to you and I wish you much success!
Also, I personally would take babies in and do ground work, etc, rather than having the 3 year old limit. Maybe put the under saddle stuff at 3+ years old, but, 3 years is a long time to deal with a horse that has no ground manners if you don't know how to train your horse.