home equity lines. max and claudia chadwick have a home with an appraised value of $180,000 and a mortgage balance of only $90,000. given that an S&L is willing to lend money at a loan to value ratio of 75 percent, how big a home equity credit line can max and claudia obtain? how much, if any, of this line would qualify as tax-deductible interest if their house originally cost $200,000?