Can someone help me out with an advertising question please?

Bank is offering a lot loan with fixed interest rate (will state the rate), 2 years, interest only. There are no points, but there may be costs such as appraisal, title work.

Our advertising should state the terms of repayment, APR and down payment required. Should we also state the closing costs?

"down payment required"

Not unless the Bank is selling the lots. This is only required in a credit sale. Disclosure of other typical closing costs is optional, but I would deem it a best practice.

The bank won't do 100% financing. Maybe it would be better to say something such as "up to 90% financing available" or "minimum 10% down"? We aren't selling the lots.