Opinions?

Alright, I've basically made up my mind but wouldn't mind some of y'alls opinions. 
The first start off, my fiancé and I are both Christian. So, naturally we want to wait to live together until we are married and the date is set for this October. We've been trying to get approved for a house but everybody says we don't have enough credit history. Long story short my fiancés cousin has a house that she and her fiancé will let us rent for $400 a month. It is a real nice 2bd 1b house for $400 a month, but the only problem is they need someone to lease it in April and move in by May. 
We can't make it on our own in the house, we need each other financially. We had thought about living as roommates for 5 months but a lot of people are against that in the Christian sense of not living together until married. But recently someone suggested eloping without telling anyone, move into the house. Then in October having the whole ceremony and go on our honeymoon which is already booked. 
What do y'all think?