The phrase "and a staggering amount" is correct and usable in written English.
It can be used to emphasize the large quantity of something, often in a surprising or impressive context.
Example: "The project required a staggering amount of resources, far beyond what we initially anticipated."
Alternatives: "and an overwhelming quantity" or "and an astonishing number".
That builds up to a lot over a year – and a staggering amount over a lifetime.
There will be live music, street entertainment and a staggering amount of liquorice-based foodstuffs.
Federal authorities have just begun to consolidate their control over airport security and a staggering amount of work remains to be done.
Completing the film was a labour of love: eight years marred by legal struggles and self-doubt, and a staggering amount of material to wade through.
More than a century's worth of cultural detritus has accumulated since Chekhov wrote "The Seagull," and a staggering amount of it appears to have washed up on the shores of the glamorously restored Biltmore Theater.
Using little more than a few perforated sheets of plastic and a staggering amount of number crunching, Duke engineers have demonstrated the world's first three-dimensional acoustic cloak.
Gambling is part of the culture for many young British players and some of them risk, and lose, a staggering amount of their wages in gambling.
He demands of his people complete, undeviating loyalty, which apparently he gets, to a large extent; he also demands and gets a staggering amount of work, night and day.
There are some who see this technology as the answer to the environmental and political difficulties of oil, but such a sweeping change will take years and cost a staggering amount.
But if he is to attack the debt mountain, he will have to raise taxes, and by a staggering amount.What is now powering the government's ever-deeper descent into debt is the growth in its social-security and health-care bills.
To an outsider, it might look like the main point of the holiday is for Americans to gather in clusters and eat a staggering amount of turkey.
