Start with your current lender. If you're a good customer-you hold a sizable mortgage, pay on time, and maintain good credit-your existing lender will probably do everything in its power to keep your business. The company may cut you a break on fees for things like appraisals, surveys, and inspections if the information is current and you meet other requirements.
Many people with poor credit history look to take out loans from friends and family. While this may be a fairly good short term solution, it might not be the smartest of long term business moves. What you need to do is refinance your mortgage and lower your payment. The best thing you can do for yourself is to shop around. I'd be willing to bet that some banks will give you a better deal on a mortgage refinancing than you think they would. Find out who's got the best rate to get the best deal on your loan. This might take a little legwork, but it could pay off. Finding that right bank to give you the right deal on your refinancing will be worth the effort.
There is a refinancing myth that says you should not refinance your mortgage unless your interest rate will be at least two points less. This myth is not necessarily true if there are other benefits to the refinance or other reasons behind it.
Closing costs can be expensive. If you plan on refinancing your home to save money, be sure to take into consideration how much the closing costs on the new loan will cost you.