When I have heard similar ads, there is usually a disclaimer that certain conditions and restrictions apply. The other caveat you could add in would be "to apply", assuming you have some process in place doing this.
In short, I'd be careful so that it doesn't appear to be a line of credit, I'd ensure there is no bait and switch product, but I don't believe the entire program has to be laid out in a radio ad.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell