I am 14 months into 5-yr 100% plan to pay off $11k; no late payments. I own 2 rentals plus my primary residence. My primary residence has $0-20k equity and is a 30-yr fixed. Rental (a) is a condo w/ $70k equity and a 20-yr fixed. Rental (b) is a TH w/ 2 mortgages and is upside down by $50k; first...