How could i come up with a good estimate for what size backup files i would be sending for a back for x amount of GB in hard drive space.. is there a way to guess this amount and come close???

What kind of script solutions could i use to send backups from multiple servers to one backup server and then have the backup server replace the files with the backup with only a simple click of a button.. free/pay doesnt matter...

rsync does a good job of doing backups.

You can have multiple servers dumping only changed/new information onto a backup server.

Does the process take place automatically,, how about restore features?

Where can i get it?

rsync is free....it comes with redhat. I just makes regular copies to the server...puting it back is as easy as copying the files back to the server. You can automate it with a cron job

thanks for the help