then bank finance plays a useful role

But bank finance is the one thing you are currently unable to provide?  I presume this is a momentary blip while the Bank works out a new strategy for its core business - but were the Bank to decide that it will in future also no longer provide such finance, I suggest your skills would be better employed by EDF or some Government agency promoting wind power - or a Bank which will provide such finance.

Once banks cease to provide such finance there is no reason why anyone would go to them for any expertise whatsoever.  Why not work directly with Government agencies or banks which DO provide finance and with specialist technical/implementation consultancies which can estimate risks and quantify returns on investment.  The project management/risk mitigation role effectively follows the money...

notes from no w here