Doesn't seem impractical to me. Looks like you used Sibelius for the notation - could you extract the parts and supply a .pdf for each trumpet 1, 2, and piano separately? I couldn't do piano, you'll need to find somebody else, but I could attempt the trumpet parts for you.
Btw., your performance notes pretty much made my day.
Oh, question. Are the staccatos esp. near the beginning supposed to be like pin/needle pricks, or just plain regular staccato with a bit of tone behind them?
Some cautionary accidentals would be VERY appreciated. I've been playing trumpet two and at measure 22 it seems like an F#... but after playing trumpet one I realised it was actually an F natural. Both A-flats at the end of measure 26 should also be marked. ... and measure 24 in trumpet one, also. Measure 32, trumpet 2. I've been thinking that was an A natural for a while now... make it a B-flat instead of an A-sharp, please. Yes, I know I'm demanding. The lips have to recognise that we're moving up a minor third, but the eyes see a second in the music. Augmented seconds are deceiving. Put a cautionary sharp on the F-sharp right before that while you're at it. I've been playing F-natural. Oh, and cautionary G-sharp in trumpet one on the end of beat 3.
After going to about page 4, I'm pretty sure I couldn't play this. I'll work on it, I have nothing else better to do, but no guarantees that the results will be pleasing. It's a lot of hard work - too many random notes for my trumpet chops which are used to more melodic playing. This is definitely a style of playing I'm lacking in. But I'll work on it for the benefit of the doubt.