down pay 多少, 会影响以后地月供, for example, if the house is $300000, and you have 20% down, rate just say is 4%, total 25 years, your monthly payment is $1262, if you only have 5%, for the same rate and 25 years, your monthly paymnet will be $1499, so maybe you could pick 35 years, have simliar payment as 25 years. somebody could pay almost $1500 each month, some people does not,
不过有句话: 虱子多了不咬,债多了不愁, 慢慢付吧,