Quadplex Comps for ARV and Price - South Carolina

[Junior Salters]

Hey guys,

I know quadplexes are not technically considered commercial properties and so their value is computed off of comparable sales within the given area. What do you do when there have not been many if any quadplexes sold within the given 6 months to a year or longer? I'm currently working off of the numbers I need to make a deal considering market rents, but I understand these deals aren't technically viewed that way. Any suggestions or help would be great!