Also-- the stronger bond thing is unrealistic, you can find bonds with 27 year old horses that are as strong as any other. It isn't about who trains them.
You'll either bond or you won't. It doesn't matter who does the horse's training.
This is where I want to slap Hollywood and the Parellis upside the head for deluding people into thinking that bonding has anything to do with self-training, or that getting a baby will make the bond stronger. It won't.
My horsey soulmate was 4 y/o when I got him. He was already green broke, and over the years we developed that almost mystical rapport about which everyone waxes poetic. I loved that horse with my whole heart and soul, and it had nothing whatsover to do with who trained him under saddle.
When he died, we'd been together 21 years. You can bond quickly, but to really get to know a horse takes years. Conny and I knew each other inside and out, and the only 'magic formula' for that is time.