I dont know about funding overall, but my idea was to have many small "miners" that would go to an asteroid and then (maybe electrolytically) gather up a ball of high grade metallic ore, maybe 1kg and then lob them onto the Nullabour plain in Australia, where there are no native rocks and almost no people.
So, I know so many problems there - safety, reentry control, shielding, etc etc, but I am just exploring the granularity, eg in the range of one big one or many small ones. Because I think many small ones might be better, but also easier to fund because no single failure totals the project.
Many small ones might mean, less up front funding for proof of concept, though not much less engineering.
But reduced risk, not all your eggs are in one basket, so maybe the engineering can be of a little less rigor because the loss of any one miner is not that great.
Probably they lob multiple payloads over time, but in the end get abandoned in place.
There is plenty of holes that can be poked, I am sure, but the point is the granularity model you have might vary your ability to get funding substantially.