Keesje, your aircraft seems to be a completely new design with an untried engine confuguration. How cheap is that going to be to design/ develop/ produce when the requirement isn't for that many aircraft in reality. Its not going to happen.
My idea is a compromise, but at least the airframe is available, operating & engineering it is well known and itsstill in production so either new build or refurbished airframes could be used. Use the A400 if there needs to be a European or new airframe (although that doesn't yet come in to the tried & tested bracket yet!)
If we are ever to have an LRMPA again then we need to find a way to do it relatively cheaply & that means using off the shelf solutions in as risk averse way as possible. I'm suggesting that in order to meet an LRMPA requirement we could fit already developed sensor systems in to an already developed airframe.
Maybe the weapons could be carried externally? Not ideal I know, but as I said, we need to be a risk averse as possible (engineering a weapons bay into a C-130 or A400 is probably a reasonable size risk) & needs must. I'd rather have an 70-80% capability than no capability at all and in my view a proposal for a completely new design of a/c = no capability.