@neauoire the most pressing concern of any client is usually risk mitigation. that's probably what they want the software for in the first place, even. a new piece of software is change, and risk is inherent to every change.
so it would be very, very difficult to find a client in this day and age who would be cool with a brand new, largely unproven tech stack with zero ability to hire for or transition locally. you really only have three options:
1. work for so little money that if they did need to pay to have someone reimplement it in something boring/reliable they could
2. be mandatory; a subject matter expert or a friend/family member of someone important
3. find a non-technical client who doesn't really understand their job as a client and sweet talk them into an awful deal for them