This is a rather large and open question (really more information is needed to more accurately answer your question)...What is the customer's SLA on downtime? What kinds of things need to be backed up?

If you just need to back up the DB's (and they are currently in FULL recovery mode) you can set up logshipping to a DR site/server, if you have to backup SQL Agent jobs (which include SSIS jobs) you'll need to script some things out...

Can you please be more specific?