Every decision has its pros and cons. Here is my 2 cents:Pro: Savings Con:1.If you 房子交银行, the default of mortgage record will show on your credit report for up to 7 years. You may not qualifiy for another loan during this period of time. If you don't plan to get into real estate market, give up your current house is not a bad idea. If you plan to invest in real estate, keep a good credit score is very important.2. No one knows where is the bottom of the market. From what I see in Sacrametno area, which is 30 mins away from vacaville, good deals go fast. There are fair amount investors are from bay area. I don't know if this is happening in vacaville. If this is true, the price in 3 years may not be as low as you thought.3. If you are paying a lot of income tax, mortgage help you lower your tax rate.