2 - 4plexes sold together - Residential Or Commercial

[Michael Vallee]

Looking at a property being offered as an "8plex" -2 4plexes on 2 separate lots in same listing. As far as financing and valuation does this fall under the rules for residential or commercial? If yes, okay. If not, why? And what are the variables that need to be present to fall under the rules for commercial valuation? Located in phoenix. Thank you in advance for some clarification, Michael Vallee