I've researched proper monk and other garb including masks, they will have a selection of them at your local tailor and adventurer shops. They can also be custom made in a reasonable timeframe if you're willing to pay an expedite fee.

Monk/Demon Hunter/Assassins' Kimono 4lbs, 2-5gp and up depending on style and quality, custom tailoring is extra, usually 2gp and 1-2 days, double for immediate service.

Masks of monistic tradition, one size fits all, 1lb 1gp and up, custom fitting included. Available in several cat and fox themed styles.

If you upload the one you want, I will tell you your options and pricing and where to acquire it.

By the way, Yulya is currently the only one in your party anyone will sell to or buy from as it's illegal to sell anything but temporary lodging, raw materials, and meager food or below to the unregistered. These are completely nutritionally sufficient and rest capable lodgings for a reasonable price, though not the safest, but the Guild would be better and more cost effective in any case.

Guild pricing will be posted in the guild, but yes, for copper registration it would be 10gp per person regardless of current affiliation as the registration does require interface with the artifact Ashley spoke of and will require the right personnel to run the test. No, it will not be a problem registering Alice, holders of Arcane knowledge would know about plasmoids and wouldn't necessarily discriminate if you pass as one and you definately do. They know just enough but not too much about them to know what they would register as or what their capabilities are. It is also a means to tell if the one being registered is wanted or has nefarious intent. Evil aligned characters are not allowed in the guild for obvious reasons.

If you are so inclined to take quests for pay like adventurers customarily do, you would need to be registered.

If you run out of money, you could hunt and sell fresh corpses to a butcher but the pay would be low, you could reasonably earn 5-10sp per day at the risk of encountering things you may not want to including bandits who would rob you even if just for the fresh kills. A level 1 adventurer is as good as dead in the wilds without the proper skills. Roads and settlements are the only safe places especially now as the gate guard said. Copper level quests are particularly tame as a result but would pay better than hunters receive and have the potential for greater pay and of course leveling.