There is also a loan called a home equity line of credit. A home equity line of credit (often called HELOC) is a loan in which the lender agrees to lend a maximum amount within an agreed period, where the collateral is the borrower's equity in his/her house. Because a home often is a consumer's most valuable asset, many homeowners use home equity credit lines only for major items, such as education, home improvements, or medical bills, and choose not to use them for day-to-day expenses.
They come in variable and fixed rate loans, and are available for very little interest. In the economy we are in today, I'd suggest a fixed rate. Generally, interest is 1/2 of the typical bank loan. You should shop around.