A lot of balance and care goes into choosing the cost of a card, more than I can express here, but looking for similar effects on existing Magic cards can give you an idea of a fair costfor example, a ramp spell that puts two lands into play ought to cost 4 mana, per Explosive Vegetation
When Alliances came out, I saved up some money from my job at McDonalds to buy a whole box
One of the more common solutions is to ignore combat damage with a Holy Day or Fog
Set: Archazias Island Printing: Normal Increase: +$1.66 Current Market Price: $5.30 Amber/Emerald Dogs is still the best aggro deck in the competitive space, and Lady - Miss Park Avenue still reigns as one of the decks signature cards
HashatonHashaton, on the other hand, doesn't necessarily need to go wide, but does need to have a fair amount of creatures in the deck for you to be able to take advantage of his "reanimator" effect