Critique my deal

I am under LOI with a concrete company and wanted feedback on the deal structure, particularly from a financing perspective.

Revenue $14,200,000
EBITDA $3,500,000
Multiple x 4
Valuation $14,000,000
Cash at close $9,000,000
Seller note $2,500,###-###-#### years, 7%, balloon payment)
Seller equity roll $2,500,000

Interested to see what ya'll think. Also, would my deal be of interest to non bank/mezzanine lenders?

Thank you.