Been a big fan of your work for a while. Genuinely have to say there is a lot of heart and soul in the work you do. Makes me actually a little sad to hear that AI is being shoved in the way of your passionate output. Out of the many creators I follow on here, your calming atmospheres and designs stand out.
While I would love to say hands down that this game alone could easily keep you afloat as a solo dev, I feel I would be lying to you saying it is an easy path forward. I do think with enough time you could do it. I think if possible, it might be worth considering trying to push this project over the finish line while you have the job security. It would likely increase the overall dev time but again it may be safer in the long run.
Also for any word of advice on the project, I highly recommend seeing if a project like this could be released not only on PC (maybe on like Steam too if possible) and Android but iOS and I would say even Switch. Cozy games like this do great on those platforms and if you want a bigger audience for going solo dev, targeting those would go a long way toward that.
In any case, best of luck. Your work is stellar and I think you can go quite far if you stuck with the great projects you put out here. Can't wait to see what you have in store soon.