I think 30 days would be risking it honestly! I wasn't half way done with the course at the 30 day mark and I was devoting 3 hours minimum a day when I was enrolled in the course. Perhaps the previous version could of been done in 30 days, but I think with PWB at version 3, having tons of machines available to hack spread out across 4 subnets, an improved syllabus with new material and modules, completing the report, and doing the extra mile exercises would be rough.
If you haven't yet, check out what cd1zz said on his blog about the course:
http://networkadminsecrets.blogspot.com/Also check out my review of the course:
http://www.ethicalhacker.net/component/option,com_smf/Itemid,54/topic,6422.msg34415/topicseen,1/#newHaving the security background is a plus - but what the class boils down to is your ability to pen-test. I wouldn't opt for 30 days; you may think you have the time currently but unexpected things come up and sometimes you end up missing a day or two (that's what happened to me).
This may be off topic but regarding a job, have you looked into:
http://rht.com Showed this link to a friend who has a few industry certs while he was looking for a job, and he hadn't heard of it before!
Good luck!
-kris