I have the scopes already.
So I'd commission an airgun smith with extensive machining experience to make a 100 to 200 fpe pcp slug gun with all my cool ideas integrated into what I consider the ultimate rifle.
Which would be the chassis and action machined out of one piece of aluminum. Yes out of the box thinking and over built to the max.
The action's bolt would be like a Anschutz 1827F Biathlon 22rf in feel and nature.
The rifle would be a repeater that takes single stack stick magazines similar to the 1911 pistol.
On top of the action would be the integral Picattiny scope mount.
Barrel attachment via threaded interface to accept a threaded Bartlein barrel fastened by a barrel nut system.
The rear of the chassis would be set up for AR-15 buffer tube and furniture.
The underneath of the forend of the chassis would have a Arca rail the full length ending at a barricade stop by the trigger guard, M LOK slots cut for weights and other attachments at the sides of the forend.
It'd be way more than $6000 though.