Leviticus 27

Not all of us will be able to serve God as our primary occupation, but He can still use us wherever we are at, in whatever capacity we are able to.  That is why in this chapter we see the Israelites giving large sums of money and property to the church in lieu of actual physical service.  God uses our resources that we pledge to Him through churches, missionaries and other organizations to further spread His kingdom here on earth.  Just make sure to follow through with what you pledge to Him.  Taking back what you have given to God will cost you a 20% penalty!