New businesses have a greater challenge - they will rely more on market research using libraries, trade associations, government statistics, surveys, competitor observations, etc. In all cases, make sure your market analysis is relevant to establishing the viability of your new business and the reasonableness of the sales forecast.
Remember not to double-dip on the capital projects EBIDTA contribution for the upcoming year - your budgetary baselines should move in concert with these investments. All projects that straddle the budgetary year, should be rolled over into the new plan. Business planning is the road map that identifies where you are headed in advance.