My Lacey girl is nowhere near able to perform like I would wish. I would love to be able to show and do all that, but she just doesn't have the mind or the training to do well in a show environment. Her mind could be compensated for (she either does really well or just cracks under pressure - no way to tell until you're there, putting pressure on her) but at her age, the training she would need to get around her mind is not something I think she'd be capable of enduring.
Not to mention her sight issues, etc.
But she is my dream+heart horse so, for her sake, I've significantly changed my goals. We used to trail ride (which she LOVES and which her "take no bs" mind is perfect for!) until she injured herself. Now, after 6 months off, I'm starting to fit her up a bit and I hope to be back out on the trails, lightly, this summer. One day I would like to do some showing, maybe do a few LDRs (thanks to Lacey, I've learned that I really like trail rides, slow and fast, with a good partner!), and try out those things I wish for. But for now, Lacey is my girl and her limits are my limits.
However, Lacey is much older than Rumor and Lacey doesn't have a whole lot of real-world "worth" when you combine her "special needs" and age. Lacey basically needs her owner to be someone who doesn't need a whole lot from her, aside from love and companionship. Rumor, on the other hand, has a long life ahead of her, probably fewer sass-tastic needs
, and a high value even as a "pasture pet"/broodmare.
If I owned Rumor and had your goals, I think I would be considering the same things you are.
If she's your "heart horse" and you can't imagine her not being in your pasture. I would seriously hesitate about advising you to sell her though!
Personally, I had to choose between Lacey and a gelding I adored when I got Lacey. He was part of a rental string that I worked with for a few years. I had the choice of letting Lacey take his place on the string and bringing him home, or leaving him on the string and taking Lacey. I obviously chose Lacey but to this day, I wish I had had the option of taking both. After that summer I never saw him again and to this day, my mind is haunted with what might have happened to him. Other horses I've bonded with I've been able to let go of, but not that little guy. It's almost been 5 years since I last saw him and I'm still not over it. I love Lacey to death and I can't imagine being without her but that does not make it any easier.
All I'm saying is that I hope that Rumor isn't the one who's going to haunt your mind for years.
This is sort of spitballing, and might be terrible morally/emotionally, but have you considered breeding her once, keeping the resulting foal, and then selling her once the foal is weaned? That way she would be a more proven broodmare (she would be a maiden right now, right?), you'd have a Rumor-baby with potentially similar skills to Rumor, and she could have a life suited her her particular capabilities... But maybe that would make it even harder to part with her...