Sorry to see that frame damage
The question is whether you know any good engineers with frame jigs... Looks like a candidate for partial or major re-tubing.
How much else is right with the bike. Might be time to carefully assess whats involved and whether its economic to carry on.
My rig started off as an idea, I just tracked down what I wanted...it took time and much $$$ but I got what I could never have ever bought.
Make a list work out what you've got thats worth working with and whats stuffed.
Anything can be fixed, but the cost can easily become prohibitive and turn a dream to ashes (been there, done that in the past!)
I'm sure forum members can assist with whatever you choose to do.
sadly my local contacts in the colonies not of any practical use to you but good luck and do some careful thinking...
Tim