can laptop as server?

Not for business. For my friends and myself usage.
it is possible run a server for 24 hrs?
what happen to laptop? what are the disadvantage and problem?

my main websites idea is for all my x-classmates and friends get together and chat, (forums) and (photo forum) which able to upload all their photos. what happen is that, if 30 - 50 ppl one shot online at same time, ( unlikely) what will happen? hang?

does laptop able to install win2000 or win 2003?

thanks

 

 

 

 

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