Selling of properties or going for it on collateral might not be too good encouraging to solve this your need but I think it's better than borrowing of money because your trading expectations might fail you. If also you don't have valuable to get the loan then I'll advice you to also stretch your hands to where you can afford.
Your story seem fishy but I believe if you're sure of what you're talking about this trade, even your family members will come on the rescue.
How can you even be believed when you made it known that you've an outstanding loan you haven't paid and still you want to take more?
Besides I haven't heard about this your pending trading story that request you to fund more before you can take your profit or close your trade m I don't even know you stance.