In your situation, I would make this suggestion:
"Buy RHEL 7.0, with its accompanying support contract."
In your situation, it will be money well spent, because you're running an Oracle database on the box(es). Just as the money you pay Oracle entitles you to ask them for assistance, the money you're paying Red Hat does the same.
Now, you can ask Red Hat directly for authoritative answers and guidance to enable you to migrate your database platform. (You can also ask Oracle about what is needed on
their side of things to ensure uninterrupted service.)
Your money will also pay for Red Hat to provide software updates – which are excellent.
IMHO, this is a case where it is possible to be "penny wise but pound foolish," and this is something that you should avoid. I think that this is also
not a situation where you should
"Ask LQ a few questions, then, cowabunga(!) 'do it yourself.'" There are serious
business risks here, and they are unacceptably high.
You
need to be running the most up-to-date Red Hat software
and the most up-to-date Oracle, all the time. And you should be investing your company's money in it. The pricing is not unreasonable for what you receive.