In case you are interested, https://www.prblms.org
How do you intend for it to pay for itself? Is it intended to be a free community and the content is the value? If so, why not just do it on Reddit (current controversy aside) and leverage their platform and userbase?
Also, practically speaking, what incentive does someone have to participate? Either in the posting of problems, voting, or commenting? That is, is the end goal to have something built? Or to inform plaintiffs of an existing solution? Is the incentive strong enough to overcome the friction of having to register on a new site?
About the second, would say that's the biggest issue right now. There is a strong interest on people to read the content, however, not so much in posting problems. That's why it is not required to register to post, to avoid friction as much as possible. I guess some kind of extra incentive would be required to encourage people to share problems.
Seems to be what usually happens with most communities. There is people interested in consuming the value, however, not so much interested on producing that value.
This was an experiment I build in barely 4 days, so let's see how it goes.