I don't think Zann had 88,000 people even to reach the skeleton crew requirement of the Eclipse. Its all very well sneaking on board and hijacking Palpatine's control panel (incl. superlaser), but actually manning the ship was way beyond his means.
Ture but didnt Zann end up having billions in credits, we all know he rather be rich but hey We were already talking about the rebellion failing, personally If the emperor knew he got robbed and his new toy along with it I think there would have been a galaxy wide bounty on his head Plus if you were that rich, I'd be easy to find a crew for that Thugs, goons, mercs ex rebels or slaves since Zann had quite a few of thoes. still i do get your point but after Zann would eventually either hide in exile a billionaire of take my thought and have 1 epic fight, the galaxy is taken over by the Empire again End of SW for at least 200 years in my opinion.