"We had one boat in Bermuda, Oracle built four test boats and, with the Japanese team as their surrogate, effectively had two race boats," Team NZ said.
"It's how you use your resources. In the end, it's about combining people and technology to create a winning package.
"The [2021] event will be all the better for Ben's team in it, and we
will work hard to try to hold the Cup and defeat whoever makes it through the Prada Cup to challenge us."
The 2021 campaign would be the second for Ainslie's team, who were expected to again be among the contenders after making the challenger semifinals on the Great Sound.
With experience in the TNZ and Oracle Team USA systems, Ainslie knows what it takes to win the Auld Mug and said the team's war chest would help them achieve that.
"Britain now has its best opportunity to bring the America's Cup back home where it belongs," Ainslie said.
Jim Ratcliffe, founder and chairman of INEOS, a large petrochemical and manufacturing company funding the campaign, echoed the statement.
"INEOS has taken on many serious projects in the past but none more exciting than this. We have a first-class team and will do everything we can to bring this trophy back to Britain where it belongs," he said.
The British team was one of three confirmed challengers for the regatta, alongside Italy's Luna Rossa and a challenge from the New York Yacht Club.
However, Team NZ boss Grant Dalton said earlier this month the team were hopeful more challengers would come forward before the deadline.
Up to five challengers can be accommodated at the event base on Auckland's waterfront.
Entries for challengers close on June 30, with a late entries deadline of December 31.