Not a simple, a huge one including lakhs of rupees.

His present condition:

Just 20 Years old, supports his mother

His present house has been badly constructed, week foundation but his land is on road-side

They have to take a loan if they are going to buy (30 Lakhs, may be)

Hez still studying, final year engineering, but has been placed in a good company

He has no siblings

What he says:

A few years later his family wont even be able to think of buying a new flat because the rates will probably double in 4 years

Anyhow, it will take 3 years for the flat to complete, so by then probably he can manage the expense

If he doesent buy now, instead buys after say, 3 years, by the time he settles, all the good flats would have been sold out. (the area he is planning to buy is currently under lot of develoments, many)

What I think

Hez taking a huge risk. What if all doesent go as planned.

Cochin, India