You were reincarnated into another world, got overpowered cheat skills, and were surrounded by hot women. Pretty bog standard isekai stuff, but you wouldn't change this life for anything.

Instead of spending your empty days alone in your room, you found purpose in this new life as a tinkerer and a pilot. Gone was your fear of intimacy, your wife carrying your child inside of her as the ultimate proof of that conquest. Also you had six wives, and they all happened to be your happily consenting slaves.

Hey, that's just how this world worked, you (probably) didn't make the rules. Your first wife did, along with the rest of the universe. Her name is Herta--the Goddess of Artifice and Creation--and she was the biggest masochist you knew. Despite all her quirks (and almost paradoxical arrogance) she was still your first wife and closest companion, happily following your every order. All of your wives obeyed and desired you, but none went as far as your cute goddess.

Yeah, life is pretty good.

===

You're in the middle of working yourself to a sweat, Lunacy Savantae giving you the energy and inspiration to create great things. You had already made a mech, a point of pride for you. Sadly it was locked in your estate's dock, too large to carry along. It might not be a terrible idea to make an airship specifically designed to carry it someday...
Anyway, you used iron ingots--provided kindly by your fit catgirl wife, Cattleya--and other materials for your latest creation: an airship.

(Used up 1,300lbs of metal ingots to create the airship)

(1,000lbs of scrap turned to ingots from Cattleya's work)

It's a beautiful vessel, one that you've been working tirelessly to form.
You probably wouldn't have enough ingots to finish it were it not for the technical improvements done by Ruby Rose, another wife of yours and a self-proclaimed mastermind schemer (although privately you'd come to realize most of her plans tended to fall flat on her face from her love of overthinking things).

On it's sides are small retractable clockwork cannons that pop out of the hull. A larger, more intimidating, iron cannon on the deck could be manually manned. It didn't compare to the BoatMech's firepower but they were a good deterrent for any enemies you might happen to encounter.

Small pods with retractable propellers acted as lifeboats, just in case you all needed to be evacuated.

It was designed to be large enough to comfortably hold wives, guests, food, and cargo to sell. Of these products you'd mostly brought cotton, textiles, clothing, iron, and the giant pearl (mostly to get it appraised rather than sold, since it was a gift from a friend). A few clankers and some automatic sewing machines Herta made were brought along as well.

Finally, it was done. Though you couldn't celebrate yet, you still had to leave for the Centrian City.