(Ripple Decisions) - This is a huge ask as this story is meant to be linear but they're never off the table if they can be done in the right way fit for this game.
(Pregnancy) - This can only be done mechanically and logically at the end of the story. After all, Maria's reveal would have hit different if she were pregnant.
(More ways to earn income) - A farmable garden is planned to be introduced in the next update which will allow you to grow various things, some of them being money crops.
(Hotel Upgrades) - What would you like to see? Visual changes are impossible with how this game is designed.
(Hiring staff) - What kind of staff? We have Lin and Android to take care of most of the stuff, and Sylvia becomes a cook in her story line.
(Marriage) - Will most likely happen when the story suits it.
(Political Drama) - On the way :)
To the Hotel Upgrades, I think I've got something. In an earlier post, I've mentioned that the game needs a money sink, and I've said a server room with purchased coolant would be good, as it would help Kali. However, that would also help Android, and now that I think about it, there is a LOT of things that it could expand into.
1) It could help Kali, as designing robotics is always easier with more processing power.
2) Android could use it, because she needs a lot of computing power, explained in her story.
3) Lin could use it, it could help the Owl Clan by interfering with the long distance comms of the soldiers that try to bully them, it would be possible to remotely check on the robots defending them.
4) Lucia could use it, perhaps her story could develop towards her being good with hardware stuff, so this could become her domain.