I see the wing breaking in two at launch of the rockets.
It would be more practical to build 3 aircraft launching 1 rocket instead of the one big one. Something bad happens and you lose all.
The launch would involve decoupling the rocket from the wing prior to ignition. The real problem would be a decoupling failure and then having to land with the thing still strapped on.
I guess someone could crawl out there and pop it loose;)