Service Console Memory - Is the default (272MB) enough for 50+ VM's?

I am running ESX 3.0.2 (52542) with my Service Console Memory running the default (272MB) configuration.  Is this enough memory for 50+ VM's? 

I don't run VCB, 3rd party apps, VMotion, HA, or DRS.  I only use the standard HP Insight Management agent installation 7.9 for a hardware reporting tool.

Any thoughts, suggestions, or ideas?

Thanks!