算法比较多，这里是简单的：

house price: P

rent income in a year: L

cost (including management fee, property tax, but no morgage): C

return = (L - C)/P

所有跟帖： 

• 再加一点 -螺丝螺帽- ♀ (170 bytes) () 07/27/2012 postreply 18:15:03

• 再加一点--cost------- insurance -hc29- ♀ (0 bytes) () 07/28/2012 postreply 05:45:13

• 回复：算法比较多，这里是简单的： -兰花地主- ♂ (86 bytes) () 07/27/2012 postreply 20:51:27