Hi, hope you get well soon.
My advise would be not to cut the steerer to your normal position. I'm slowly coming back from a bad injury, and you want as little load as you can on your shoulders initially, and there is no shame in an upright position. I'm running a ton of spacers and the stem pointing upward, but that way I can ride at all.
To be honest, I wouldn't upgrade that bike right now. Hold on to the cash and see how you do when you start riding again. With a new position you might want a new saddle, a different seatpost. I had to put on clip-on extensions, because I couldn't hold on to a regular drop bar for long. My injury is different and I hope your way back won't be too difficult, but you might have to become creative in the begining.
I'm assuming you'll do some sort of rehab? Take that stuff serious and don't just focus on the injured parts of your body. Make sure you take good care of your back and hips while you're not riding.
"Nothing compares to the simple pleasures of a bike ride," said John F. Kennedy, a man who had the pleasure of Marilyn Monroe.