Ive been playing sins of a solar empire, and i love the game except for the fact that defensive structures like the gauss cannon suck, and i have to be constatly moving my fleet to ward off attacks. Ive heard about entrenchment, and they say theve improved defensive structures. are the structures worth it, and are they strong enough to hold off a fleet until reinforcements arrive? also ive only seen ways to buy it online with a credit card. is there any way to buy it with cash?