Look, Fargo, you're a minnow compared to all the leviathans of nations. If you're invaded, become a puppet government; it will work out a LOT better for you than if you fight it. I don't think anyone would bother invading though because you're in a politically neutral situation- I can't image anyone here has any grudge against you. In fact, your economy might be better off if you disbanded your military and used the support of an ally for protection. Frankly, I don't see how you will be able to keep all that stuff maintained and be able to feed your people.
RFE: Interplanetary Colony Economic
Erinaum sends out a colonization shuttle to Titan. Expected time of arrival in three years.