II Corinthians 8:12 For if there be first a willing mind, it is accepted according to that a man hath, and not according to that he hath not.
The question is do you want to give. God is not asking you to do something that you can’t-do. God is not even asking you to do something you do not want to do. He wants you to love Him so much that you want to give. What blesses the Lord is your desire to love and please Him. He wants you to desire to give.
Notice the willing mind part! A gift given out of necessity or due to force is no gift and no love. God is not asking anything like that from you.
He wants you to want to give. Then He wants you to give proportionately. He is not looking at what someone else gives and comparing it to what you give. He is looking at your heart, your willingness, your desire. He is not asking the impossible.
He is just asking you to do what you want to do because you love Him and want to do it. So when it comes time for you to be giving give only because you want to! Give because it is in your heart. Give because you are in love and it is an expression of that love. He is looking for a willing mind!