Local market research
How many businesses like yours are there already? Pick your activity and a municipality. You see the registered competitors nearby, how dense they are against Belgium, how many enterprises in the sector start and fail, and what the sector earns. A look at the market, not a judgement of your plan.
Try for example
How many establishments already carry your activity in the municipality, on a map, and whether that is a lot against Belgium.
How many enterprises started in the sector last year, how many failed, and how young enterprises fare.
Gross margin, net result and solvency from the sector's filed accounts.