The message of the kingdom is to love God above all, and love each other. What that really means is, to love each other. Loving people means that we do what we can to bless them and see that their needs are met. It means being generous, without thought of personal gain or how much we can afford.
The reason we can give without worrying about the cost is because … my God shall supply all your needs according to His riches in glory by Christ Jesus. (Phil 4:19) So, go ahead and give. There’s more where that came from. You’re just spending the Father’s money anyway. If He’s the one supplying your needs, then it’s His money, and He has a lot.
Practice generosity and see how it will affect the people you give to and your own relationship with God. See if He won’t take care of you, even if you give away you last dollar. It’s an exercise in learning trust. Once you see how God will bless you for being generous, you can begin to trust Him in every area of your life. You can throw your cares on Him, because He promises to take care of you.
He who has a generous eye will be blessed, For he gives of his bread to the poor. (Prov 22:)