The mare is attractive enough, but has a long back, straight shoulder, steep croup and hind legs are camped under
It takes a lot of money to raise a foal, time you feed that mare correctly during pregnancy, raise the foal to riding age, and it takes no more money to raise a good one then a mediocre one
With transported semen so available, that anyone can breed a good mare to a great stallion, standing a distance away, it makes no sense to keep a horse a stallion, unless he is exceptional
If you yourself can't put the training on him, to proven him under saddle, in working classes, be it Ranch Horse and not breed circuit, then you are going to be spending major bucks to try and get that horse proven
Less then that, and you will just join those turning out more horses, with little market value
This may sound harsh, but it is a fact, I learned, raising horses, as I like you, tried to 're invent the wheel' in the beginning.
Geld him. You will have more fun, as he has the looks of making a great gelding