20 for move building, 50 for wave builder.
This is a very very bad way(or a good one if you want to ruin the game) .
When travian's first version was released, nobody had phone or tablet. Wave builder for those devices but you give it for money?
I have a realy bad feeling.
Released smartphone version will cost 100 gold?
In the future, we will also have to pay for bug fixes? 75 gold to not lose you solders on a glitch...
The big money is npc and fast building and plus. Why are you so greedy?
Are you with or against the players?