The reason the idea of sticking V1s on a cargo ship is a non starter is legion. Firstly. the V1 is a remarkably innacurate device, and was prone to technical failure - chucking what was essentially a barely guided drone into an enemy country on the right heading, then hoping it lands somewhere which isnt full of disabled lesbian ethnic minority lesbian schoolgirls who are photogenic for enemy
PR, and that it bombs something useful is a vain hope.
The next problem is that you cant turn back the clock - the techniques, machinery and manufacturing stlyes used to make the V1 no longer exist (damn you lack of Jewish slave labour...), and as such we'd need to make it to 21st century standards, which immediately puts the price up. To make it to 21st century standards means updating the design to put things into it that have replaced components etc, and before you know it you've got a brand new and jolly expensive missile on your hands.
As for the Q-Ship - firstly you'd need a major ship with massive alterations to do it, in terms of magazines, safety, fire control, targeting, damage control etc. 30 crew would be enough to stand 3 watches on the bridge and engines and thats it - how do you propose to sustain, support and fight the ship. The second problem is how do you propose to transmit firing orders to the ship to actually let lose its salvo of missiles? Then how does the ship fire and reload them without being fairly obvious to any vessels nearby?
Q-Ships were great in the days before AIS and 24/7 connectivity, wheras now they are a waste of time.
The whole idea is a tremendous waste of resources, and built on an impossible concept which would never actually work. Why not spend money on proper warships rather than something as dangerous to the crew as the enemy...