My trio are indoors and let out of their cage and with me basically all the time I'm home - I won't leave them unattended though as I have a rat living in there who'd enjoy biting any noses or feet that poked through the bars, should they reach his cage :shock:
The pair outside get let out when I'm in there feeding, cleaning out and checking on the other animals.
Both lots get at least an hour out in the run with me alternating between sitting in either to socialise with them too.