without coaching can we follow Munish Bandari's book

I suggest you to do so. it will work 100%. I have adopted same technique.

Best of Luck

How much time will be required for preparing law by our own?

Ya hand Written book is Sufficient...

 IT Will take 2 Month to Complete it perfectly.....

If u have enough time than u can follow study material,

Otherwise u can Follow TIPS OR Surbhi Bansal Books For it

All The Best

:-)

Agree with Salmaan, Surbhi Bansal 's notes are better option, I will not suggest ICAI book. But u may refer study material for topic covered. It would prevent you from taking any risk

Best of Luck