There are some other details that need filled in. Is it intended to be a permanently small'ish business or will it plausibly become a medium to large business

There are some other details that need filled in. Is it intended to be a permanently small'ish business or will it plausibly become a medium to large business if it's successful? Will you be pursuing traditional venture capital and or any outside investors? If things go well will you be hiring locally (such that you'll need office space) or do you aim to keep everything remote for the early going? Which of the two partners is better qualified to handle the legal requirements & complexities of maintaining an incorporated entity, whether in the US or Canada? Does one partner have a desire (more so than the other partner) to move to the other country if the business is successful? Both have arguments in their favor depending on those answers.