Just a nugget.
A business idea without proper management plan is one that can be considered to be dead on arrival. Business success revolves around excellent management plan first before capital size. With a large capital chunk into any business that's lacking in proper planning, such business can inevitably collapse, turning into a wasted investment.
But on account of proper management structure on ground with even the small size of capital, it can be sustaining to such business's success in the long ... Experience should be considered as a key asset in business planning and as a key factor it's important to always involve those with experience in the area of business when planning. Never neglect this!
What would you consider a business idea with a proper management plan? Because there are a lot of businesses that build on top of foundations with the try-and-see method. Learning out of one's own mistakes and upgrading their business plan is really the backbone of any starting business. And really, the same argument could be made not only for management plans but also marketing plans, financial plans, development plans and so on. There are many stones in the way that can trip any businessman up and ruin the entire business. But the question of whether they learn out of their mistake and continue building remains to be asked...