Take a step back, take a breath, then tell me you aren't overthinking this.

I'm personally ambivalent towards this; it could possibly serve to replace the current flagship, but it doesn't seem to 'fit' like it would like in a game of Sins.

There could be hard cap for competitive game and no cap for free game. But if someone could achieve levels where he could build two superb ships, and his opponents can't, that's probably bad matchmaking.

Unless the game has resources other than money and you need enough of those to build a super ship, those kind of caps don't make sense in a game like this. 

I mean if it needed a dread lord power core and there are only 5 in the galaxy, then that could work. But with it just abstracted to money? I don't see it. 

I disagree. No offense.

I'm with the OP: if my almighty empire can support a huge, over-designed flash-toy, then it can damn well afford two. No, three. Umm... maybe five...

Like aforesaid, if there are the abilities to make a ship, then another equaling it or bettering it can be made. I LOVED sins, and deplored the way having a single titan warped the strategies you could employ, and removed your ability to take down a fleet with titan support with just a fleet- you were then limited to your main fleet, identified by the fleet in which your titan was nestled, and a handful of response divisions that were there to delay the enemy until allied reinforcements could arrive. I used to use several roughly-equivalent fleets and relied on mobile defense fleets. Now, I bunker down with guns 'n' mines, and hope they hold until I recall my titan from wherever it was. Why I couldn't build two or three has continued to elude me for the entire intervening time. I just built one, I have two crews, and a large surplus of cash, but somehow, the dockers have forgotten the blueprints to reproduce it until it explodes (at which point they set down the whiskey and get about doing what was a moment ago impossible).

I also request bigger ships. LOTS more bigger ships. I want to build ships so ridiculously large the largest size map is required to hope to afford its gargantuan upkeep costs. I mean ships bigger than the planets. I mean ships so godforsakenly large that only a deep-space shipyard painstakingly made over the last half-a-game is capable of berthing their huge bulk long enough finish building them. Then I would be very much obliged if I could build a terror star into its nose as one of its weapons. Because if it fits on a station, for a good deal more money it can be made fit onto a ship. It would be nice if then, I could add the construction bays needed to build other ships, and put them on the ship, hence making it a mobile factory. There are plenty of things the ships could do if we're allowed, which makes for more strategies and hence more fun to be had.

"It's not too big. Your mind is merely too small to comprehend its power," Excerpt from game "Merendia"

Oh, and: to the guy who wrote the OP: Good work. Step back forward, and start breathin' again. You were not overthinking it. No one-ship limits. They are bad.