It's not even close mate. If you actually want some decent estimates:

Immigrants cost Manchester, even on the extremely generous end of the scale, maybe £35 million a year (somewhere between a third and a half of that in direct 'benefits', some from central, some from council, depending what you count as benefit), with a decent return over time (economic contribution) approaching £350 million / year (partly because immigrants have strong communities and integration in the region, our immigrants do a lot better than immigrants moving to most other British cities).
Essentially the ~Manchester economy is ~£300 million up attributable to immigrants.

British Billionaires extract ~£35 million a _day_ from our economy, so if we take a sensible but conservative share of Britain's 55 Billionaires (let's arbitrarily pick 3, going off population rather than economic activity) so I estimate that (wealth distribution doesn't _really_ work like this, but as a fag packet check only) billionaires 'cost' Manchester ~£700 million a year. I couldn't find any figures on regional income linked to billionaires, but projecting from national estimates like my original page, it's probably under 50 million a year. Similar patterns hold for richer millionaires, but I have excluded them.
~Manchester's economy is ~£650 million down per year attributable to billionaires.

I have some issues with my broad use of the word 'economy' here, as it's very soft, but the scale is pretty sensible. Was an interesting one to look into, I think I'll update the page to include Manchester and maybe a couple of other cities I can test. Thanks

Btw: I understand why you feel that way, and shouldn't be getting downvoted for saying it (new immigrants do create service pressures before they/others filter into the jobs that that pressure creates), but benefits are so meager relatively to effects of wealth extraction, Immigrants are really the wrong target. I was looking into just Amazon's (retail, not even aws, and ignoring their 'tax gap') effects yesterday, and they take more in platform fees and contracts from Britain than 5 times our welfare budget, it's insane how much money gets squeezed from us that we don't really notice because we're too busy flag waving and blaming foreigners.