One of these days, if you're faithful, you'll own a mansion that won't cost you anything!--No rent or expenses! Jesus said, "In My Father's House are many mansions. I go to prepare a place for you." (Jn.14:2)--And your rewards There will be proportioned according to your works here. Whatever you have There, you will have already sent ahead in the way of souls won, victories won, battles won and rewards won for your service here!
It's like the well-known tale about the rich woman being led to her Heavenly Home by an Angel: They walked past many beautiful mansions where other Christians were living, until finally they got to a poor section of shanties, and the Angel led her through a gate into the yard of a tiny hut. "What's the big idea?" she said, "I'm used to very fine living!" "Well," the Angel answered, "the abodes up here are built of what each person sends on before, and this is all you sent!"--Whereas others had sacrificed and lived their whole lives for the Lord and helped many others, and great was their reward in Heaven!
So just be faithful, and one day you'll find that whatever you've paid here is not worthy to be compared with the glory to be revealed there in that Heavenly place that He's gone to prepare! (Rom.8:18; 2Cor.4:17)