This might sound bad because of what you have just gone thru but I will bring it up anyways. Since you can keep your mare, would you consider getting a foal? Do you think that could be an option for your situation?
They require regular lessons over a much longer period of time. Only you would know if it's something that could work.
I did it after dealing with a problem horse which I trained and resold (for good money *cough*cough*) and now doing it again with 3 yearlings
which except for one I have owned them since they were 5 months old
The bond I have with 2 that are with me is beyond words and even tho they do require regular short term lessons one on one, raising them when done properly is quite pleasant and they turn out the way you want them. I will say now tho, when it comes down to breaking and teaching them the basics under saddle, they will be trained by the trainer.
What kind of horse are you wanting to get? A QH? Can I maybe entice you with some PMU foals? I think they would be in your price range. Some gorgeous sport horse foals. I will pm you.