2007 volvo vnl frame rail repair help?

Under the sleeper or engine no problems Black original paint on it Cannot even compare that area to what i have behind the sleeper.
Like it's a different truck

Rusty behind the sleeper But mostly surface rust.
For some reason the main problem is at the front axle, the area i highlighted on the picture,that is thin

 

I see.Never did this kind of job on a truck.That's why i'm so anxious.I have to admit i am

I had a company cut my car hauler trailer in 1000 pieces,literally.(also because of the rust)But that company is specialized in rebuilding car carriers
I said from top to bottom,left to right,tail to front,cut everything out and replace with new tubes,sandblast,prime,paint
Nothing left on the old trailer ,only the 2 axles on the ground . That's it !

When i saw that i said NO WAY this thing will be ever together in one piece ,and the right way.
And i was wrong they did it,took a very long time, but they did it

We went from this :




To this : click on vimeo link

Vimeo

But i m kinda hijacking my own thread )

So back to the truck discussion

 

Twist resistance...u see i didn't even think of that .
I have to show all these ideas what u guys gave me to the owner of the shop just to make sure
The owner made bunch of phone calls asking frame specialists what would be the best option

First person said replace rails from tail to bumper.That's it. But then the owner looked at me and said that's a huge job i don't think we can do it.
Another guy said glove it from inside
Then another said glove it from outside...
Then the owner said about the cutout behind the cab,and my question was will it be done perfectly aligned? He kinda scratch his head a bit " yes u have a point...pfff hard to tell"

And me, the owner of the truck just staying there and my head spins around.
Ok,now what? i m not an expert



thank you

 

Ok..

got a phone call today from the owner of the shop where my truck is,that he found a complete volvo frame 2013 or 2014 from bumper to tail for 4,000 "and something"
The person or company (i have no idea) sent him pictures and my guy saying frame looking very good.
I never saw the pictures
And we speak tomorrow what i choose to do,cut my truck behind the cab and weld it on or replace the whole complete frame since it's newer

Then later on today i got another call that he found another complete frame also 2013-or 2014 " little bit" more expensive but has title.
The other one didn't have a title

Now i have even more questions than answers Any red flags?

Until now we were talking about fixing that #### truck somehow .Now we are talking about titles?

Then tons of more questions....Since my truck is 2007 and than if u wanna use the whole frame of a 2013-14 volvo, nothing is gonna match with anything,starting from the holes on the newer frame, to tank locations and what not,it s impossible.

I m looking at my friend's volvo which is also a 2007, like mine ,and not even these two are similar in length ,hole locations,he has 150 gal tanks ,i have 125,his frame is different

How can u just buy a 2013-14 volvo frame and put it on a 2007 ?

Maybe i don't understand what he is trying to say due to the language barrier ,i donno



Otherwise a very good and nice guy,i have known him for 10 years, so it's not somebody i met yesterday.

For example a friend of mine needed his engine to be rebuilt and didn't have all the money.
This guy did it for him,and said " give me my money when you start working little by little"
Who does that?
This is a shop where me and friends of mine and many more people are parking and do all the work on our trucks since day one.