I don't know if this is something that VA Tax changed or something that ProSeries changed.  There used to be a code for "out of state" but I don't think they allow that anymore (which is pretty dumb since it can certainly apply!)  Drake has a code 300-Unassigned.  I don't know if you can find something similar.

That said, Lisa's probably right and this goes on Sch E.  I've certainly had clients with airbnb income who made the bed every morning and cooked breakfast for the guests, those go on Sch C.  But typically the guests are just renting space with no services provided.  I believe there was a recent court case or CCM that said cleaning BETWEEN guests does not constitute services.  The services have to be provided to the guest while they are staying at the property.