Giving isn't about money, God doesn't need money, He is God. Giving is about discipline and faith, as we give in faith God is faithful to provide for us all our needs. There are many scriptures that tell us to give of our first fruits, just as God gave His only Son to die for us. God cares about our hearts, and the heart of our gift, He doesn't want it if you don't want to give it. "So let each one give as he purposes in his heart, not grudgingly or of necessity; for God loves a cheerful giver." 2 Corinthians 9:7.
So, whatever you give, give it with a cheerful heart.