Thanks for the advice. I'm very aware of the inclination to start bargaining, although I'm not sure yet it that's enough to prevent it properly. To be fair, there's been some bargaining already, which I feel can't really be avoided given how some initial assumptions may be wrong. For example, I've observed that I've had retention problems after my first launching, so I'm currently switching things around a bit to see if I can lower that barrier to entry. Initially, I'd planned to have x users at this point, but I don't think it's that odd to try a few more small experiments to see whether there's still potential in it. I just hope that not being afraid to throw them out will be enough to stop in time.
However, I also know that especially the part where "I might start working part-time if I feel there's still potential in it" has a lot of wiggle-room for bargaining in terms of whether there's really potential. But then at least it'll just be a side project again, which will hopefully keep me grounded :)