It would appear that they're pretty good at fund raising these days:
They have some great backing from dodgy billionaires. They have money from Crispin Odious but their biggest backer is the very patriotic Christopher Harborne who has a 12% stake in Tether Cryptocurrency which is based in El Salvador and which is being used to fund the Russian war effort. Chris's money is based off shore of course so that he can avoid paying any pesky tax to the UK. He previously bribed donated £1m to Boris Johnson and coincidentally Quinetic (Harborne is the largest shareholder) received an £80m MOD contract. Reform have also received large donations from the Reuben Brothers, UK Billionaires, and UK property investors. Their money lives offshore to avoid Tax. Other donors include multi-millionaire Gary Dutton who admires Enoch Powell.
Oh and a special mention for the hapless Robert Tchenguiz. He owns a property empire in the UK but his money lives in the Virgin Islands. It's a bit of mystery though how he can donate given he has been director of more than 320 companies in the UK most of which have been dissolved owing money. The company he used to donate to Reform had lost over £2m when it made the donation...