Paying for floor replacement ?

I'm finding out the pretty 67 Barracuda I've recently bought is needier than expected.

The floor is much rustier than I realized.

I'm not able to do a project that big yet.

Do any of you have an estimate, or wildazguess what the bill might be to replace the floor and trunk floor ?
The cars a convertible, it'll need bracing, but have more working room ?

I guess while they're in there, let's add the sub frame connectors.

Thanks,
Steve