~60 coins excluding bitcoin & litecoin tried recently/used presently - 19GB of the plain 2.5" 5400RPM hard disk (to lower the power usage).
All daemons of PoS coins are running 24 hours a day plus some daemons that are not transited to leveldb. When I have to reboot the box for some reason and I want to start all of them then the whole startup takes more than a hour - daemons are started one by one to avoid too much concurrent use of the disk during index loading
Have you ever checked how much bandwidth those clients require /day?
I was surprised when I checked Kluge's post:
https://bitcointalksearch.org/topic/selfish-node-min-bandwdith-needed-for-bitcoin-core-tons-of-other-data-334778
Yes, I saw this post. I don't mind - I have a flat rate fortunately.