In order to determine if TRID applies, we first have to determine if Reg. Z applies. As you mentioned in the Reg. Z flowchart, if a transaction is primarily business, commercial, or ag. purpose then the transaction is not covered by Reg. Z. That determination is sometimes a fine line; however, you stated that based on revenue stream and/or potential rental income the transactions were primarily for business, comm., ag. purpose; therefore, Reg. Z would not apply and TRID would not apply. There is no specific percentage requirement in the regulation; however, “primarily” typically means greater than 50%. You have to walk through the Reg. Z coverage rules first before you move on to whether or not you have a TRID transaction.
Of course, TRID applies any time you have closed-end consumer transaction secured by real property which can sometimes mean there is no residence involved. It could just be a closed-end consumer credit transaction secured by land. Key is to walk through Reg. Z flowchart first, then the TRID flowchart. Let me know if you have additional questions.