I know this is kinda odd but a Land Transport that can load and put actors on its turrets while keeping the cargo safe would be a nice addition. Is it possible?

Hmm, that's an awful lot there, we haven't even done the dropod stuck onto an ACrab land transport yet, let alone the extra manned turrets. Probably possible but really hard to do.

If only we could give ACrabs exits, damn!

Or if we could add actors to other actors' inventories.

Fake both.

Adding actors to someone's inventory has been done, I remember a .gif of carrying Zoey from a L4D mod. I can't remember who did it, though.

That was Azukki.

You can add new actors to other actors, but not existing actors.

Naxx and the makers of Apollocalipse made pilotable mechs. But the actors piloting them don't show. There was an assault helicopter mod which spat out an actor when it gibbed but the actor was the pilot in the first place.

Maybe the mining cart and elevator concepts help this somehow though I'mnot sure.

Me and pete are probably making an APC version of this with a back hatch.

Will probably have the HMG ontop on the tank version be useable by people in the sense of cavecricket's turret stand.

Controlling two units with one input has been done before. Just make a ship that has its opening command disabled and is unselectable. Check if you're controlling the crab it's connected to and then if you press a certain button the craft opens and closes. As for the unmanned turrets, if nobody remembers how to do those I'm going to cry.

Hmm..... Maybe have a invisible gun where the hatch is, make it lightly shoot up to 3-6 pre-equipped units and then make a infinite reload? I have seen guns that shoot actors before like in WWM, so shouldn't this be possible?

Several much more effective methods have been posted in the thread. Please read the thread and have an understanding of the topic at hand before posting.

An apc or such could be awesome with some cannons. Maybe even a 20mm aa-gun looking foward to some updates

There are no updates to be had. The OP never intended to make it, and the others were only discussing the possibilities of implementation.