Mmmm ...
Wear would be extreme ... really to be avoided if possible ...
The actual wear is hard to determine and of course is dependent on the abrasiveness of the sand ...
Do keep a very careful eye on the blade leading edges .... I have seen H500/300 blades open up with frightening effect ...
Think carefully about using blade abrasion tapes .... they can be more trouble then they are worth ... BUT can if monitored well can save you the cost of new blade sets.
If flying into areas where "brownouts" may be possible .... get some instruction in landings and takeoffs in those type of conditions .... they are VERY tricky and disaster is not far away if you are not totally prepared and know what to do ...
Good luck ....
