Ask HN: What to do if an idea requires more resources than you have?

I have a business idea. The problem is that I don't have enough resources to implement it. Usually I try to start small, but in this particular case customers are large companies and the product makes sense if at least a few dozens of them are involved. It seems I need a whole team of lawyers.

The question is: What should the next step be?

Here is what I came up with:

1. Find someone in the business, let them do all hard work.

The easiest way, but you don't control your company anymore.

2. Raise money.

There is a high risk of focusing on money istead of focusing on the product.

3. Make a demo version of a product, try to partner with some big companies.

Safe, slow pace. No idea whether it can be successful. But I can make it myself, so this is the best option I see right now.

4. Wait, do something else.

What would you do in this situation? Share your experience. Thanks!