Laces here are quite expensive
Maybe you could get together with a few friends and order a bunch online. E.g., $4.00 from rainbowsports.com, $3.00 from
www.cozzisports.com, and lots of other sources. Not expensive enough to worry about, and like others implied, well worth keeping an extra pair in your skate bag.
I may take extra care so I can keep my boots almost forever, but I just don't feel it worth my time to be extra careful of laces. Then again, I normally use cotton laces which last for many years. (Maybe they'd last less long if I could do real jumps.) But if you use nylon or (I think) polyester, and a lace frays at the end, you can make a new end by slightly melting it with a match (be ready to put it out if it catches fire), and rolling it thin. Don't use your bare fingers, or you might burn yourself.
I've been meaning to experiment with nylon parachute cord, from a camping goods or climbing equipment store - I'll buy a thin enough type to fit my lace holes - because it is easy to find very colorful cord! I like the idea of bright red or orange against black boots.
But parachute cord is round, and very slippery, so you have to know how to tie laces tight, and not let them slip as you pull from hole to hole (A lace puller may help if your hands feel clumsy, or hold a finger over the prior hole while tyeing the next level, or while you tie the bow. Try tyeing the bow as a double slipped granny knot, which it is. I.E., after tyeing the first wrap-around [overhand knot - or better yet, a surgeon's knot, with two wraps], tie another wrap-around with looped ends, holding everything tight.
Slippery cord introduces an extra element of difficulty to tight laces, so some of you shouldn't try. Real laces are fine, if boring.