In the past his trips to the US have been paid for by crapto investor Christopher Harborne (he's paid multiple times), the racist NY Young republicans group, venture capitalist billionaire Sasan Ghandehari, Bassim Haidar (Lebanese billionaire) and George Cottrell (not sure where his money has come from).
All in the name of working for UK citizens you understand. 😉
I'm sure he has investors that think they can make a dollar or two in war.