I suppose some people would do that. I think most experienced manifesters would have a much easier time of it, without having to spend money they don't have. Spending money you don't have is lack-based because you don't trust the proper funds will come so you can purchase what you want. So you'd probably never get those funds. Highly doubt anyone here would do something like that.
Like moonrambler said, if you're open to something it just comes to you. Who knows how it will happen.
Better to keep the details to a minimum, and just focus on the feeling of abundance. THEN pay attention to what happens.