Dagenham and Redbridge owner said the NL and NL North & south need £20 million to support the 67 clubs in those divisions.
His letter can be viewed here: https://drive.google.com/file/d/1Q8Y3XpTAzqNyA9AIiFjydC0k7wG8kPEt/view
Not sure how he reached that figure, but as you say, £35 million...