To rent or buy, a 10 year perspective

Here is a comparative calculation to evaluate;
whether to purchase a 30L flat with 10L DP and 20L loan for 10 yr period, or to rent the same for 10yrs. And after 10 years, where is my finances stand w.r.t this purchase decision?

From the calculation, I am finding that I will have a corpus of 37L after 10yrs if I don't purchase it now. If the property appreciates to 45L atleast, after 10 years, I am losing 8L by not purchasing it now!
From the income tax point of view, HRA and home loan interest nullifies each other and hence I have not considered it.

I bought the flat where I was renting and I did this calculation to come to a conclusion. Please add to it if I am missing something ;). Or members can bring any other perspective to the table.