if your set on having 'the foal experience' why don't you , instead of breeding your grade, buying a mare with the sole purpose of breeding it, do what some of the others here have done , and rescue a mare already in foal?? there are many around, or many horribly cheap and in a bad space that will go to the knackers yard .
surely that is a better option if you are set on having a foal . There was even someone here fairly recently I think that bought/rescued a mare with pretty decent bloodlines for what they wanted (or so I understand , I have little knowledge of bloodlines as they mean nothing to me).
isnt to say I agree with the predicament at all , was just a suggestion that might be a better option for all involved?