NO ONE who has opened a successful business would think 2 months!
Six months is very iffy and usually spells disaster, even with a great, solid, proven franchise! Most, 90% and more, would tell you that a year is a reasonable amount of time, and even at that you can still loose!
I HIGHLY doubt that revinues to cover "ALL" the cost of monthly operations whould occur in a two month period of time, not just this business but most!!!
It is very easy to google the guidelines from better business and other online sources.
I ain't running this down but you start this with only $75,000 and you might as well send me a check instead, I'll at least buy you beers for a year!