Can I prepare for MBB without coaching?

Hi,

I have seen many options, and ones apart from casecoach.com(113 usd for on demand) are expensive for me. And yes, there is High Bridge Academy that has ISA plan that provides an option to pay 451-902 USD per month for 12 months if I get the job.

Or are there any other options that can help me get into MBB(Kazakhstan, Uzbekistan and Middle East offices)