Phil Wood makes the best freewheel rear hub , axle will never bend, has stainless steel axles ,
rather than regular steel, solves part of your rust issue..
http://www.rivbike.com/products/show...iv-hubs/18-259
smaller flange model is sold thru most bike shops, or bought direct.

Mavic open sport , rim and as others said , Brass nipples and SS spokes
Double butted spokes are very good but cost more ..

Had long use of 15 ga straight in a 36 spoke wheel , 14 gage for utility stuff..