Hello dear, 

If you really want to do btech in good colleges, then don't worry  about money.There are various way which help you in financial matters in college admissions.

In many  colleges ,there is relaxation of 66% fees of tuition fee if your family income is less than 5 lakhs.You can  avail this remission as you fall in this category. Also you can  get education loan for your studies with minimal rate of interest. With this facility you can easily complete your b.tech.

Hope this information helps you

Good luck for your future.