@Nodemansland : @baker summed it up really well, but here is an estimator you can use to illustrate what they said with regards to the amount of data that can be stored, and how long it would take to fill it:
Small note here: We’re talking about /24 subnets.
And the estimator above does show results for one /24 subnet.
If your 5 IPs are scattered among different /24 subnets, then you may multiply estimations it gives you by 5.