Stop in for a cup of coffee

So I need opinions. My final project for this class for my masters is to write a business plan proposal that'll be used throughout the remainder of my Masters program. Only a few requirements:

Must be a passion/hobby (how they'd prove this is beyond me but ok)
Starting budget is 150,000 USD
Must employ at least 1 other person to start with.
Must be legal.
Must have a 5 year growth plan

I'm drawing a blank for ideas as to what I'd pick.