Ah found it.
I remember this thread from a while back, and I thought I'd put in something because I'd been thinking about something similar lately.
I think it could very well work. I think if your species had a very long view, they might build something that could last that long.
* Solar energy from the local star would be the key. At TL16, efficiency of solar power collection could be great enough to do any number of interesting things. Particularly in the life zone - the space station wouldn't have to worry about heating - the greater threat would be trying to radiate the heat and distribute the heat evenly over the station. The most obvious solution to the even heating would be spin, but at a high technology level they might have come up with a kind of passive solid-state electrical generation system that takes advantage of temperature gradients to generate power so they'd intentionally not make the thing spin (the ultimate choice I think would be if you want to have gravity or not). If, say, electrical wiring is literally like veins of gold that run through the meteorite hull or something along those lines, it'd be very difficult to damage the "wiring" of the vessel.
The Impacts Issue:
* Big hunks of rock have survived billions (or perhaps even more) years without being pulverized by micrometeors. If the hull is thick enough, I'm sure it could survive quite a few impacts, especially in such a "short" time period as 3,000 years.
* Whipple Shields! It's good enough for satellites. Perhaps the space station is simply surrounded by a brute force solution of whipple shields, a hundred layers deep, but each layer is extremely thin. It'd only take a like 4-5 layers to actually stop any given micrometeor, but the designers really didn't want to mess with things for a long, long time. The windows, perhaps are actually some sort of many-meters thick liquid (at least at room temperature and higher - something that isn't a problem because it's in the life zone) that quickly crystallizes upon contact with vacuum after finding it's own "surface tension" ; essentially a transparent, self-sealing window and ablative shield.
* Passively generated shields. I remember reading an article a while back that said that scientists had figured out a theory behind a micrometeor shield like a "plasma" shield that'd be quite low powered. If the high-tech builders had some sort of solid-state system that was designed to be extremely durable, and essentially immune to breaking except by physical destruction, it might have its own weak plasma deflector shield that has been in operation for thousands of years, powered by solar energy.
* I remember another article I was reading about an idea that we could herd meteors away from earth using even a small satellite using a "gravitational herding" effect. A loony idea I had a while back was, what if a space station were surrounded by hundreds, possibly thousands (or even more) rocky bodies placed at precise points some hundreds of kilometers out or something which would sort of act like a passive gravity "duct" where any micrometeor would be deflected away. While such a system would eventually fall victim to entropy, the builders might have put in sufficient backup so that they wouldn't have to fool with it for geologically short but long for us humans time - say, like 5,000 year long maintenance-free lifetime.