Sorry that you can no longer pull your bow.
My crossbow only needed bolts when I bought it new.The open sights are easy to get on your deer and the range is actually out to 30 yards.The poundage at 150lbs is sufficient to do the job.
My bolts were carbon but I can't remember what brand,my brother is using it now.As far as transporting them they are not so much heavy as they are awkward by comparison to a vertical bow.They do not go through the woods in the thick stuff without catching on something.
I always carried a separate bolt with a practice point or a judo point just for that pesky squirrel(when in season) and to unload string tension at the end of the day.I would shoot it into the soft ground or a decaying stump. As far as buying one at a fair cost I wish you luck.
I hope that I've helped answer at least some of your ?s.
I hunted with a crossbow for about 14 years after I broke my back ,neck,and left wrist and dislocated my left shoulder.I couldn't pull my old bow either. Send me a message if I can answer any more ?s