I dont think its hard to create more than one account when you are using proxy or something but I dont think there is any need to create more than one
No it's really easy. You can use another google account or create one. I had 5 other gmail accounts that I turned into Google+ accounts for different things.
Goggle plus accounts can be created at ease without any problem, but it is limited by Google to maximum five accounts in a day. If you create more accounts it will be considered spamming by the Google.
If you have more than one Google Gmail accounts then It's easy to create more than 1 Google + accounts. So, It's not difficult task.