About the infrastructure costs, I am not too worried, the platform is already profitable. By that I mean the costs this year have been covered by the few subscribed customers. I am far from having enough to pay myself and a lot is due to the hyper-optimisation of the infrastructure design, but I am quite proud of that.
I am working on it more than full time, have been for the past 7 years. Losing my job back then was very painful, and I have not been able to bring myself to take another job in that field. My last employment turned out to be a very toxic place, and you won't find it on any of my CV or public profiles. I like better working for myself, even if it does not pay so far. I enjoyed immensely architecting this project. To earn a living, I moved in a remote location as I could not afford rent in the city and I have been taking the odd jobs, from fixing computers and gardening to woodworking and house maintenance.