بسم الله الرحمن الرحيم
According to Shariah it is not lawful to get a house on 2000 monthly rent (which is very small as usual) by paying five lakh rupees in advance. It is a form of getting benefit from loan which Hadith speaks to avoid.
كل قرض جر منفعة فهو ربا (مصنف ابن ابى شيبه)
Allah knows Best!
Darul Uloom Deoband