The property-sale closing statement, the bank records tracing the proceeds, the executed purchase agreement, and an escrow agreement whose only release condition is visa approval. A bank balance and a letter of intent are not enough.
Trace the money from the Canadian sale into an irrevocable commitment
Hypothetical example: The evidence has two halves. The first is source: for a Portugal Cove-St. Philip's investor selling a rental property, that means the listing, the agreement of purchase and sale, the lawyer's closing statement showing net proceeds, and the deposit of those proceeds into the investor's account.
The second is commitment: the signed purchase agreement for the U.S. contracting business, evidence that the purchase price has been paid to the seller or into escrow, and, if escrow is used, an escrow agreement stating that the funds are released to the seller on visa issuance and returned to the investor only if the visa is refused. Officers accept that arrangement because the investor can no longer withdraw for any other reason.
What does not work is a refundable deposit, a purchase conditional on financing or due diligence still to be completed, or funds that remain in the investor's own account with a promise to pay. Equipment already bought, a lease signed and licence fees paid are also committed funds and should be listed.