Grigri+

I only buy from shops that are at least somewhat specialists in climbing gear. Lately I've been liking HowNot2. They're a relatively newer company but they're climbers and route developers, they tend to have good stuff at good prices, and before they were a shop they were an amateur gear testing lab

2x static ropes, 1x dynamic 1 static is your backup, and has a fall arrest device like a petzl ASAP with an ASAPsorber attached The dynamic and other rstatic are your working and haul lines, you're already used to those The ASAP allows you to go hands free and no catastrophe knots which is lovely, j

One doesn't need to be a caver to be experienced with ropework. They have GriGris and ATCs; they're rock climbers, possibly trad rock climbers or mountaineers. Would I advise OP to do this? No. But the rappelling and ascending system OP is describing is officially documented by Petzl: https://www.pe