Except policy wise even Bernie is more of a social democrat. The socialist thing is branding for him-in large part because republicans have branded everything to the left of far right as "socialist". May as well embrace it if they're going to call literally everything socialism.
No one would consider the USA of 40-50 years ago to not be a free market country and that is pretty much all even the farthest left democrats want to take things back to, economically. A resurgence of new deal democrats, really.
No one is bold... because I would.
However, the funding thing is a real issue right now and it has little to do with US politics. The Big Banks have been/seen real problems in the REPO markets and have some real concerns. Since this is a big project you aren't getting just local bank funding. And I really wonder what is up with Blackbird as they have a project here on hold. I think they tried to grow awfully fast.