What might your wife like from you that will only cost you a little time? A love letter. In deed, write a love letter for wife is a good way to show the love. It can make her feel happy even cry. It won’t cost your money but it is priceless. Your relationship also better than before. 
My charming wife,
I send you much love and fondness to you with this letter. My adorable wife, how far can you go for me? I am keen to go far and beyond just to let you realize that you are the most excellent thing that has happened to me!
Sweetheart, your love is deeper than the deepest ocean, extensive than the skies and brighter than the brightest star that shines all night.
My loving wife , you raise my soul every time I think of you. You are my sunrise and the shining star!
Love