Another option to think of....

If traditional funding doesn't work, consider thinking outside the box and partnering with a local developer or real-estate investor.

Both may have property they're unable to do anything with and provided you have experience and they see you as a low risk, they could be willing to partner.

My guess is Rent, Electric (due to size of the facility) and Insurance will be your highest cost. If rent can be subtracted short-term and build-out handled by the partner, you may not need much.

Good Luck!