What is the best way to borrow money to invest?

[Tri Nguyen]

Hey everyone, Is there a way for me to get access to a credit line or a personal loan for let's say 10-50k? I would to use the money to invest in these shoes that are coming out soon. They will cost 800-1k on the after market and are guarantee to double up in price in 6 months. So let's say you bought 50 pairs for 50k, they will go up to 100k in 6 months. GUARANTEE. But how do I tell possible investors this? They will probably think I'm crazy. What do you guys think is the best way to borrow money to invest?