We borrowed a friends capsule for DS1, he was only 2kg (roughly 4lb6oz) when we bought him home from hospital, and even in the capsule we had to use folded up wraps so he would fit properly.
With DS2 we didn't bother with the capsule and put him straight in the car seat, he was 3kg exactly when he was discharged and fitted the car seat so well. I also found it easier than a capsule too, the capsule was so hard to get out of the car I never bothered taking it out and even on the few times I did the capsule was very heavy and awkward.

I may have hired a capsule if there was somewhere locally that hired them out, but I wasn't prepared to travel to Perth just to hire a capsule.