I urge anyone thinking in plans like these to take pencil, paper and a good old calculator and just play around with the numbers. Go on CMC and look at the exchange volumes, estimate the costs for website host, signers, and BKC exchange fees. Then make a profit estimate.
If you don’t know the exact numbers, then it doesn’t matter, you will quickly notice that you have to go into very unrealistic territory with your numbers to get any significant amount of money. Even good traditional exchanges usually start on a loss or barely make it even, and this here is definitely worse than that.
Please calculate it through, present your numbers, discuss the parameters. Then, if you see something good, only then, you can discuss something like bailing out a debt like that of Nu.