71.7 - what case is vivo here?

[Phoebus Apollo]

omne genus enim poma volo sint circa cineres meos, et vinearum largiter. valde enim falsum est vivo quidem domos cultas esse non curari eas, ubi diutius nobis habitandum est.

I can't tell whether its datve (which would make the domos cultas esse phrase a dative of possession) or ablative (something like 'it is a big mistake for there to be decorated houses while a man is alive')

 

[Adrian]

I read it as:
Surely it is a great mistake to furnish houes for the living (dative of agent), yet (to him) give no care to (those houses) where we are to dwell far far longer [=after death]

 

[Pacifica]

It's a dative of possession or possibly reference. I don't think it's a dative of agent.