DIY mortgage refinancing (with some professional help):
The bottom line: If you’re mortgage is from 2008 and earlier you can save a significant amount of money
Cost – 2,000-3,000 NIS (not including early termination fee).
Time investment – 2-3 days of work, mostly in shorter sessions.
Total duration: about a month and a half.
Important – These figures assume you can communicate with your bank in Hebrew, otherwise I do recommend paying more to have someone else do it.
Somewhat more detailed explanation: https://goo.gl/MFpskU