Does Regulation Z currently apply to owner financing? My guess is it does not. Which would mean these revisions would also not apply to owner financed transactions.
You would have to look at the definition of creditor under Regulation Z.
Read the comments section.
Of course this will be applied to owner financing in time.
Subpart A—GENERAL
§ 226.2 Definitions and rules of construction
http://www.fdic.gov/regulations/laws/rules/6500-1400.html#fdic6500226.2
(17) Creditor means:
(i) A person who regularly extends consumer credit that is subject to a finance charge or is payable by written agreement in more than four installments (not including a down payment), and to whom the obligation is initially payable, either on the face of the note or contract, or by agreement when there is no note or contract.
- - - - -
If this is not your business, it doesn't apply to you.
(v) A person regularly extends consumer credit only if it extended credit (other than credit subject to the requirements of § 226.32) more than 25 times (or more than 5 times for transactions secured by a dwelling) in the preceding calendar year. If a person did not meet these numerical standards in the preceding calendar year, the numerical standards shall be applied to the current calendar year. A person regularly extends consumer credit if, in any 12-month period, the person originates more than one credit extension that is subject to the requirements of § 226.32 or one or more such credit extensions through a mortgage broker.