What you are asking as far as I can see: if your friend is willing to give you a rhea if you can prove you are engaged in the game. instead of that you want someone to give you the isk bypassing your friends request and all or virtually all the risk is on the person who provides the loan.
+1 for the correct eve mentality
-1 for misleading your friend
-1 for what I would consider a very very high risk venture.
4.8b scattered all over the place to get a 7b loan to get a 10b ship. Most peoples concern is that you basically take the rhea after getting the loan and you basically walk away with a rhea for 4.8b.
Im sure you can see why this would concern a potential investor.