Didn't say it'd be easy, man!

Seriously, though, I couldn't do it, so I'm not really saying you should. This is supposed to be fun!

What I was proposing, I suppose, was what I would be looking for in a purpose built ship. I'd also be looking for purpose built life-boats, too!
In the RW (& in Whif World ? ) there haven't been any such purpose built vessels, even those which claim to be in RW are really modified passenger liners.
So, I say, go with the best compromise that you feel happy with (& more rafts is better than nothing).

Guy