Working within the parameters you outlined, have a look at the ATPro for all the reasons you mentioned...I do agree with Toms advice...but lets just look at this a moment...
You may be on to something here...a lot of dry sand gets walked past by the guys with the heavy water rigs, and the Pro would be perfect for working all of that, you can choose to upgrade the Pro to a large NEL coil and become a 'dry sand specialist' if you so desire, and never set foot on the wet...
You can also get by with a mid quality light aluminum scoop and not need a super heavy tool for working deep targets in the wet sand and surfline..since you wont be hitting anything deeper than lets say 6-8 there with a VLF generally...
On some large beaches here, I walk the edge of the surf and drag the coil right through the riffle trough. Easy since you are not swinging the coil, just dragging it... 3 miles down and back, walking briskly, all the while eyeballing the dry for signs of activity, travel patterns, towel and cooler tracks, etc. that may need a sweep....if a guy happens upon what looks like a fresh cut, a guy can then wade in and sweep that area good up to knee/waist deep...
So a VLF employed in this fashion, understanding its limitations and utilizing its strengths, covering a lot of ground and going after shallow targets on salt is indeed a valid strategy, but you really got to be in phenomenal shape for all the miles you will be putting in...you can easily figure on walking on the sand 100 miles+/mo if you just go out for a few hours every morning...so everything has to be light and efficient, including your clothes and footwear (barefoot for me) and preferably before the Sun comes up or you will quickly get overheated and the crowds are also a problem to hunt around...@4am to 6am and out...

Mud