Ipcc exam

taking pendrive classes for all the 8 subjects would become a headache you would have to manage around 80 lectures of each subjects and it will also cost a handsome amount but definitely less than face to face
i would suggest you to take coaching of the subject you find difficult- mode of coaching can be pendrive or satellite or face to face
and for other subjects you have to manage by purchasing books of reputed teachers from the market

It will be very tough to do all this and your job.
You have to emerge as a pioneer to clear both groups

Think and make a choice to make a clear way to your vision.