I payed for every level, 1-450 and it took me about 6k gold.
Also, every mat might not be avalibe on the AH so, it might take a while to get it to 450.
You can prospect, or mine, only if you know the Mining profession. If you do, then if you see a vein and you have a mining pick equipped, then you can right-click on the vein and you will start mining for ore. --------------- prospecting comes with the jewelcrafting profession, you need to prospect ore to get gems so you can craft jewels so you can say that when you choose jewelcrafting as your crafting proffesion you should choose mining as your gahtering profession. you are going to need 5 ores to be able to prospect starting with copper, tin, silver, gold, iron, mitrhil, thorium, etc etc. depending on you level of jewelcrafting (if you are level 1you are not going to be able to prospect mithril ores) from the prospect you'll get dust of the material and jewels wich you will use to level up jewelcrafting.
Cost is SGD1,800..Salary SGD3,000
As much as an "entry level car".
about $1250.00
$40
2.25million elixir
$130/sqft.
52.4million
1600
$40
300 Dollars
A level 10 wall cost a total of 3 million. If you want to upgrade your wall from say level 4 to level 10 ,it would cost a total of 5.45 million coins