As a private lender, it is important to be aware of the licensing requirements in the states in which you operate. For non-owner-occupied BPL, these states require a license to lend: California, Arizona, Nevada, Utah, Idaho, Oregon, Minnesota, South Dakota, North Dakota, and Vermont.
In fact, they'll likely ask for documentation of any accounts that hold monetary assets. This is because mortgage lenders want to know that you'll be able to afford your down payment – if one is required – and make your monthly mortgage payments.
Installment loans can be unsecured or secured by personal property and other forms of collateral. These loans are considered installment credit, which you borrow in one lump sum, versus revolving credit (e.g., credit cards), which you can reuse over time.