Need help getting a GH to continue bank
Be warned that getting the hall is the easy part of expanding the bank. Just getting the https://wiki.guildwars2.com/wiki/Guild_Treasure_Trove requires you to get to guild level 20, which means sinking mats into many upgrades designed to be done by 10’s to 100’s of players. Not just mats, you have to build up Favor by doing guild missions. There are a few of those you can manage as a sole player, and thus get the Favor up week after week, but unless you’re rich enough to buy all the mats, it’ll be a very long time before you see that guild bank expansion.
That said, if you still want to do it, you will need a total of 7-9 people who have updrafts (if going for Lost Precipice) or bouncing mushrooms (if Gilded Hollow). You pay the 100 gold and any Favor needed to start the guild mission, gather your friends, and you go in the hall first from the portal in. You load in, tell the others (in squad is best), they enter and select your guild name from the drop down list. You activate the mission with the NPC inside and everyone heads to the first spawn. Focus down the vine tenders, then the vine, deal with misc adds, rinse and repeat for a total of 5 vines (ok to mess one or two up, you get five fails before the mission fails). Then head to the hall center to fight the Axemaster. Break his blue bar, don’t touch his shiny red-black floor slime trails, dodge/los his whirling axes. When he dies, you touch the crystal, the instance resets to being your guild hall, and all your helpers who aren’t repping your guild get booted out
I am generally glad to help (on NA) but am fairly busy with RP, LS, and RL this week so I can’t commit to any immediate aid.