Regardless of whether or not he used your funds to purchase the property, the use of your private loan would be to renovate a home that he indicated he'd eventually use as a primary residence. That, in and of itself, makes the loan consumer or personal use of funds, not investment/business or commercial purpose. So, you'd be responsible for all consumer protection and disclosure responsibilities as well as regulatory requirements for being licensed to do consumer loans in the state the property is in. Additionally, you'd be likely subject to any usury limitations in the state the property is in, as well. That doesn't just include the interest rate but can also include many/all loan costs as well - varies by state but can include points, title, escrow, processing fees, etc.
Also, if you have the borrower typically sign a non-owner occupancy certification (which we always do with our loans and recommend other PMLs do) the borrower couldn't sign it legitimately because he already informed you he's planning to move into it.