We checked around the bank's in our area, and State regulation, and decided on a 4% floor, an 18% ceiling, a 2% yearly cap and a 6% life of loan cap.
So, in reality, the ceilings are actually much lower than 18% right now.
If we settle a loan at say 5% with the 6% life of loan cap the ceiling will be only 11%
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God made the world in only 7 days... but he didn't have any paperwork.