Those are some handsome boys!!!
I always used an outside trainer for the many horses I had shown. There was one year I had two boys shown, and literally had to choose who and where. So I had a trainer in the midwest show one young stallion only AMHR, and had a trainer in Florida show the other young stallion in AMHA only. It was a bit crazy that year, and after that I tried never to show two horses that would compete against each other in the same class in the registries But that crazy year the boys did me proud and we got a 2nd place in color with a leopard appaloosa boy in AMHA Nationals, with the other boy doing All Stars and scoring very well nationally. The trainer didn't take him to Nationals like he was contracted to, and wound up taking his own young stallion instead. Needless to say, Contract broken and money returned with the horse. LOL
After that, I used a Florida trainer and showed both AMHA & AMHR and did very well with several of my horses. It does get expensive and you really need to stay on top of how many shows your horse(s) is going to and making sure the trainer is not just promoting their business. Show fees, travel, health certificates for crossing state lines, etc., can all add up. Be prudent in doing enough shows to qualify for Nationals, but look at the outcomes of the shows and be critical of your own horse to see if going to Nationals is financially reasonable -- i.e., the horse has a real possibility of getting a National Title and/or placement.
Best of luck!!