The current rate for a 30 year mortgage is 6.85% which is totally secured by the real estate. This guy is asking for an unsecured loan at basically that rate even though it carries a much higher risk. Higher risk should come with a higher rate. I would tell this guy to take a hike.
And the fact that he claims to be a Christian means nothing, my experience doing business with “Christians” is that they were no more trustworthy than anyone else.