cost the lest!
let me tell you my true story:
my in-laws stayed with us for 4 years,
during which period, we bought 2 NEW cars,
we don't need to pay EXTRA for housing,
we paid the same for grocery,
they did almost all the house working,
the only inconvenience is that I couldn't yell at miao sister,
if I did, I have to explain them that 'SHE deserved more
and I gave her less than she deserved and I am a good person and
she is much worse than I', other than this inconvenience,
who cared about 'China is always good and usa is always bad'
as they always told me. I missed them very much,
now sister miao is always preparing one hour dish washing for me.
Anyway at least my in-laws are very easy going persons
although sister miao don't agree with me.