School of Planning and Architecture

All of them are good, every college you have mentioned has positive sides to it. You may even look into other colleges for options, here is a link for all approved architecture colleges across India - https://www.coa.gov.in/index1.php?lang=1&level=0&linkid=25&lid=26

Approx. around 5L.

NIT will welcome you for sure. Good luck

Both are equally good and it depends on a lot of other factors which you need to look into from a personal perspective.

You need to be in 10% cut off bracket ,
SPA delhi is best institute for architecture and for best you really need a good score. in my opinion you need to score 250+ for guaranteed admission in architecture but 215 would be enough for admission in planning branch.
But with these marks you will get selected in the spot round only. For admission in first round you need a score of 290+.