That's the other beauty of the game, they are pushing for high end visuals & that means only the top most rigs will be able to run the game in all it's beauty at release as it will kick the crap out of a lot of systems.
It's going to be designed to be a benchmark for other games to live up to in terms of immersion, size and visuals. The CryEngine is looking sweet and whilst we've only just got the first look at some of the ships via the Hangar Module, you can see the detail that's already gone into even the smallest ships.
Multiply that detail in the larger ships and you can see why it takes so long to design and create a fully working ship, with correctly articulated parts.
Make no mistake they are aiming high & there's a lot riding on their shoulders, but the Backers just have to believe they'll pull it off and I think they will, no matter how long it takes.
There are more ships being built, just not ones that we'll be able to fly initially as the Universe will need to be discovered and unfold, so they can't release all the details of everything they're making and throw in the single player campaign of Squadron 42 which is ultimately shrouded in mystery to avoid any spoilers, then you realise there's more going on than meets the eye.
Time will tell, but people will pledge, what they can afford to pledge.