Not that it's terribly on-topic or helpful, but what you need the most is prayer.
If anyone is seriously claiming that they can guarantee five nines then they are seriously unserious. Not that it's impossible but it's simply a gamble and the house always wins and you're probably neither the house nor Daniel Ocean. Amazon can't do it, ebay can't do it, Microsoft can't do it and they all have loads of cash and loads of smart people and you may bet that they try real hard.
There are too many things you don't know (like: what will be the next vulnerability found in the software you choose to implement the solution) and too many things you don't control.
