I know of a company that thought they would be in this category. They ended up raising a very large seed round (1MM+) from a VC and pre-negotiating a follow-on of equal size, should they need it. That way the expectation was set from the beginning that this company might take some time to build out their product and see traction.
It's smart, because the discount for the follow-on was pre-negotiated, so investors get perhaps a more favorable discount if the company is a run-away success, and the entrepreneurs were able to buy peace of mind, and could count on the money regardless of macro-economic forces.