We sometimes use a homemade bow...
My hubby cut a bit of green cherry (surinam cherry) took it in the workshop and carved it down with a disc grinder, single pull, its shaped very nice, quite bendy and springy, oiled it with veggie oil...three years later its still in perfect shape.
He mounted a spinning reel drum just above the hand grip (a bit of AC insulation tube) we use 6lb test fishing line...the arrow is made out of the tip of an old rod, feathers on one end, heavy screw in the tip. The line is tied to the end of the arrow and pays out just fine from the reel. Once its over and down, I tie on throw line, pull that up, then my climbing line.
he can hit a 6" gap at 60'...me, I haven't tried it yet!