This is a subject I know well, my unsuitable, bought on my own, isn't he pretty, OK so he's 9 and only just backed, but I'll trust you
put me on hospital last summer.
The fortunate thing was that the day before my trainer had found me a new horse, the original intention was that he would be my go to horse when I didn't want to fight with the big guy, turned out he was my way back.
He cost me $3200 and was a ranch horse being sold because he was to slow for the job, and he has been a star for me. He is a little over 15hh, 13 this year and a gelding, if you can find the same, snap him up. My guy was never advertised, he came by word of mouth through my trainer. Being a working horse means nothing much spooks him, so he is safe, but he is challenging in that he has never been refined, so it is a constant progression trying to make him a light and responsive mount, so I don't get bored.
Put the word out when you are ready, hope that the horse comes to you rather than you have to go look for him, networking pays. Have your trainer or someone you trust and knows your situation come with you. What you are looking for is out there, all you need is a little luck, and being in the right place at the right time.