As mentioned above that second house can pay emi of the first flat is right.I bought a flat in pune in Feb 2005 and i got it for 16and half lacs and the emi i pay is 14500.That time the property rate for the same was 1325/sq.ft and now the rate has gone up to 2800/sq.ft and can fetch a rent of at least 10 to 12 thousand.So think about it.Of course the rate should be low when you buy and should increase to such extent.