If he/she is a good customer, recommend local bank-lah, give local bank some business
well that all depends on whether he is buying the property under the company or as foreigner... and it also depends on credit standing....
and dont forget you can always advise your client to take a loan in their home country..
there are many ex colleague of mine who is currently working and residing in Singapore they are taking Singapore Bank loan for their property in India (as the interest rate is the much cheaper comparing to taking a loan on their own country)
So there are many ways to workaround.