costs per capita

Hi there!

For a commercial web site it's necessary to have a budget and there an estimation of the costs. One item on the costs side is the need of space on the database as for many hosting providers they bill you by this amount.

I would like for our forecast to estimate the costs per capita for each user. Like this I could see how the total hosting costs are developing with the growth of the amount of users.

Before I start re-inventing the wheel I wanted to ask here in the community if somebody made any tool to calculate for each user the used space in the database.

As it will be an evolutionary process to get reliable numbers when the web site will be live I would like to ask if there are already any statistics done by somebody here and if you would share your data.

Thanks,

Adrian