I plan to make it a complete product. I'll only update for bug fixes and typos.
My next game Idea I have planned will probably be using Godot. I don't use Unity, also I don't have experience with GameMaker. Might use RPG Maker MV for some other projects, because I want my purchase to feel justified lol.
The third question is a tough one, because I want to make it a hobby but I also REALLY want to make it a job. I've learned from countless game devs about marketing, however I'm struggling with trying to put up my YouTube channel back up. So I am more leaning on making it a job, but I don't really like having my games be paid. Id rather them be free. Even if I did involve payment, I'd rather make it DLC but the game be free.
Yes I do have marketing. Right now I only have my YouTube channel (That i need to open back up T-T). Also I did actually make an advertisement video on my Instagram channel, but again I'm not really sure if I want to use Insta that much.
Admittedly these videos are more about profit but they're still helpful information, even if you're making a free game.
Goodgis is a really cool youtuber. He has some good info in this video. He also talks about how you should TELL your story on social media.