Invoices marked paid, lease payments, installation records, licence fees and deposit confirmations, each reconciled to bank statements. A balance in an account described as earmarked for the project proves availability, which is not the test.
Receipts, not balances
Hypothetical example: a Hampton couple submit a bank statement showing a substantial balance and a letter saying the funds are dedicated to the new laundry. On its face that is money they could still spend on anything, so nothing is at risk. What answers the requirement is a schedule of what has actually been spent, line by line, with the underlying document for each entry: the lease and the payments made under it, the washer-extractor invoices with proof of payment and delivery, the plumbing and electrical contractor invoices, the licence and permit receipts, insurance binders, and the opening inventory of linens and chemicals.
Reconcile the schedule to the bank records so that every figure can be traced. Where an escrow holds part of the money, include the escrow agreement so the release conditions can be read.