Nailed it. And that’s not to say looking for investors/grants/funding along the way is inherently bad, but it’s got to be part of a larger business plan for eventually generating revenue a d becoming profitable, and that will take time and odds are they’ll fail just like most other business startups. 

 100% - you should really always find someone else’s money to build with. Someone else giving you money is critical feedback that your product could be viable. You just have to offer them something in return (ROI) and make their investment be part of a plan to someday be self-sustaining