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- Not Just a Contact Database
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These optional components give you more power to connect and engage your supporters.

civiCASE
Case management for clients and constituents.

civiCONTRIBUTE
Online fundraising and donor management.

civiEVENT
Online event registration and participant tracking.

civiMEMBER
Online signup and membership management.

civiMAIL
Personalized email blasts and newsletters.

civiREPORT
Report generation and template management.



I think the bigger factor is
I think the bigger factor is your experience. You could probably run the above scenario smoothly on a VPS with 512MB RAM. But if you don't know anything about tuning LAMP then you may need more.
I haven't thought about disk space in years. It's rarely an issue.