CAP B767: Everything you ever wanted to know about flydubai can be read
here, and it's well worth a read.
Wrt living in Dubai: I hated the place, but my wife liked it.
Wrt working in Dubai: You can expect FZ to get the maximum amount of work possible out of you, along with lots of back-of-the-clock flights and a very unsympathetic rostering regime,
Wrt saving money in the sandpit: That very much depends on the lifestyle that you choose to live. With just the two of you there, it's possible (
if you live somewhat frugally) to put away a few coins, but do consider carefully that Dubai is in expensive town and if you're not carefully it's easy to burn through the coins.