where do I find the magician and the tailor for the market hall quest?
The walkthrough can help you.
The magician is on the 2nd floor of Fire Dungeon and the tailor is in the forest where you can fight the crocodile and the bear, after Logtown.
After you defeated Octorn, there's not much else to do in 0.63. The Water Dungeon finale comes out next update.
Are you by any chance using a save file from a way older version of the game? RPGMaker tends to have problems loading certain scripts once you've already passed the triggering point in the game in the save file, that'd be my first guess if Nick's home doesn't show up for you on the map. That's why each update comes with prepackaged save files, so people don't lose all their progress any time this might happen. As for point 2, that's not a quest, in 0.59 Spedu changed the purple tiger's home, so that merely trying to go up the stairs would trigger the text box asking if you wanna get up there with someone. You can try to re-download the game and use preset save file 02 on version 0.63, which puts you on Pine Island with your party level 22. However, Nick's home has already been unlocked there and his items been picked up, so you won't get the introduction cutscene and additional interactions, I'm afraid. If you're playing public version 0.18, you can try save file 02 on there, which puts you at the end of the Beach Cave, just before you enter the pirate ship for the first time. Yeah, you'll be losing a lot of progress, but at least you won't have to start from the beginning. (If you're using Joiplay, I'm afraid I can't help you.)
Yes, you can find him in the public version, too. After you find him at the Banger's Club and at the beach, he randomly shows up in the restrooms at the harbor in Shiptown. Just leave and re-enter until there's a pink '4' above the right stall door, and then enter the middle one. After that, he's in the last prison cell on Pine Island. If you got more questions like that, you can check the walkthrough
