I think the melon in picture 3 is called 'Honey Dew" (melon) in Australia.

There is a 'horned melon' (or kiwano; Cucumis_metuliferus) that is quite easy to grow (compare to rock melon and honey dew -- need chemical spraying foe mildews and fungal diseases) and becoming quite popular in European markets. Thailand can be a 'source' of this melon in world markets.

Best wished for the new year.