Treaty nationality for the investor and for at least half the enterprise's ownership, a substantial investment committed and at risk, a real operating enterprise that is not marginal, and development and direction by the investor.
Five conditions, and one of them is the hard one
Canada is a treaty country, so nationality is normally the easiest condition, but it is checked twice: once against the investor and once against the ownership of the enterprise. Substantiality is proportional to the cost of acquiring or establishing this particular business, so a low purchase price raises rather than lowers the proportion expected. The funds must be irrevocably committed and subject to loss, which is why an agreement conditioned on the immigration decision with money held in escrow is the usual structure.
The enterprise must be real and operating, producing goods or services rather than holding assets. It must also be more than marginal, meaning capable of generating more than a minimal living for the investor and family, judged on present capacity or on a credible projection over roughly five years. Finally, the investor must develop and direct it.