Hey, sorry for late reply and ask away:
1) Don't wanna get anyone's hopes up, but it will take a long time. We're a team of two and we don't get to work full time on the project. We are currently taking a break (I'm still doing a small update to the demo) and we're jumping between other projects, but we will come back to Terminus eventually. 1-2 weeks ago I had to recreate the entire demo because windows update corrupted my files, so I'm not very energetic to work on Terminus. I hope you and everyone else understands.
2) We plan on adding a story demo, but it'll require a lot of work as well as updating the motel section. The story mode won't be anything big, just something to set the scene.
3) We're pretty much keeping the SH style with our own twist. The full version will have more effort put into textures. The ones in the demo are just enough to test out the whole thing (with Crocotile, affine textures and lighting)
4) To be honest, we're not sure. We thought the demo will take at least 15 minutes but for some people it's more than 40 minutes lol. We're hoping to make it at least an hour or two long, maybe longer for hard riddle difficulty since on that difficulty there's more levels to explore. (at least in the demo)
I can't say for sure but I prefer keeping expectations minimal.
5) I think it depends on the development and workforce. We don't know how much the project will be worth when it's finished so I don't wanna accidentally throw around random numbers.
6) We'd love to have it on consoles, but I don't think we can afford it. I think Xbox license is cheaper and there's less hoops to jump through in order to get it... whereas Sony is very strict with licenses/ports. I dunno if Terminus would be comfy enough to play on a phone but if there's enough demand, might as well consider(?) and the Vita is dead lol
I hope this answers your questions and if I got something wrong, ADC will correct me and/or probably reply with his own info. Cheers! :)