Get a new job. You can get a contract job paying £500 a day quite easily in the UK. Do a 6 month contract, save up some runway, work on your own thing for a while, doing whatever interests you. Repeat.
Is this is what you are doing? Please tell me more about it.
I do consulting and 100/hour (EU/US/CA, not sure for the UK) is pretty average, and 5h/day is a reasonable number of billable hours in a day, assuming not too much time is wasted on sales (and sales can be a billable discovery phase instead, if the process delivers value for the client).