First off, do not commit suicide. You say you've been entertaining the idea so these problems are too serious for you to not seek professional help. You're ill,

First off, do not commit suicide. You say you've been entertaining the idea so these problems are too serious for you to not seek professional help. You're ill, there's no shame in this, but treat it as seriously as you would any other illness. Call the Samaritans and speak to your doctor. Do not do anything that will make your health worse. As to the legal situation, hire a lawyer. Seriously. You've said your client has hired legal aid in your country, you should immediately stop talking to the client and speak only through a lawyer. You could inadvertently make the problem worse by saying the wrong thing. Things like "I agree I am responsible for his losses", for example, you lawyer would stop you from saying. You aren't acting in isolation here and you're not in the business of insuring your client. If your client is spending $6k over the course of a year on something that, if it fails, will lose him hundreds of thousands and he doesn't act to protect his own interests then he is partially at fault. You've made some mistakes here but you're not the only one. It's not the end of the world, everything can be salvaged. I know people that have been in a similar position and less than a year later it was sorted, they had a better job and were happy. Do not give up, do not try and solve this alone, you need help from people who aren't so close to the project. Good luck.