^Agreed. With damage like this, there is likely rust in other areas of the vehicle as well. It has been mentioned before, but that exact spot is a problem area for rust on the GVR4. The fender holds dirt and debris against the body right there, and the metal in that area is poorly prepped for the amount abuse it sees. I can say for sure, paying someone to repair that area in the condition it's show in your pictures will likely cost in the thousands. It will be a time consuming process if done correctly.
The real problem you have is the metal in that area is no longer salvageable. The rust has penetrated all the way through the metal, and at this point the only way to correct it is to cut away the problem areas.
Once the rusty metal is cut away, your next big problem is fabricating panels to weld back onto the body. This is the hardest part of the job IMO. Since it's not just a flat panel, you need to bend and mold the metal to mimic its original shape. This is the really time consuming part that starts to cost money, since it isn't your typical prime and paint body shop repair job.
Honestly, unless you have some cash to drop, this is the kind of job you need to undertake yourself. Surprisingly, it can be done with minimal specialty tools. A MIG welder and a few metal shaping/working tools would suffice. The good thing is, the area is hidden by the fender, so the repair just needs to be strong and complete, not necessarily look good. After you repair the metal, you need to seal it up with POR-15, Rust Bullet, or something similar.
There are quite a few members who have, or are currently repairing rust damage to various degrees. I'll link a few recent ones that I've seen below. Collectively, these threads outline pretty much everything you need to do to completely repair the area. This will give you an idea of the amount of work it will take, which will either need to be done by you, or someone else who is being paid. After seeing what's required, you'll understand why a job like this won't be cheap. Take a look at the threads below, and post back with any questions you have. Bobdole's rust repair MAJOR rust repair My rust repair; minimal