Can an investor share cash-flow with a $0 co-signer?

[Steven Joseph Fogarty]

Hi. just asking hypothetically (in case the seeking of partners is not allowed on BP), but if a co-signer on a mortgage got cold feet, is it possible to attract another by offering a share of the cashflow from a vacation STR cabin that grosses $70,000 per year? Would that be interesting to a sophisticated investor? Thank you.