One thing that can be helpful – is to model the main shape flat, then add the bend in afterwards. That gives you a good overall view of how it all fits together, and saves you from popping around between the different views.
I thought I’d have a go at building the shape.
The different coloured loops were what I put down first to define the important edges (the tighter loops were cut in afterwards).
Then the white bits in the middle filled in the gaps. Getting poles in these areas isn’t a problem, as they won’t be on a curve or an edge.


