Think I'm screwed

I got a 73 duster recently that was going to be my project. I guess I fucked up and failed to see the cracks in the frame. Is this cheaply fixable, like within $1000 or should I start looking for ways to lose this car?

@moparmandan beat me to it. When I read a post like this, I always ask if the person can fix it themselves. If you have to pay someone to do that repair, You will most likely be into it for SEVERAL thousand dollars. If you can do major repairs like this yourself, then I'd think at or below $1000 is possible. I also agree with a few others in that this is not going to be easy. Of course the definition of "easy" likely varies wildly on this forum. I'd tackle that repair in a heartbeat, but I would not call it easy. Also, I would be against riveted floorboards. You can do it that way, but the floor is a major part of the car's unibody strength. I believe that there is a right way to do a job like this, and that is the right way, and the right way does not include rivets.