Thanks in advance
Questions like this shows you are not ready for this type of venture because there is enough to read from the forum even by opening thread of requests made, then following how it is filled and repaid with all the drama attached, you have a clue of what its all about. When you also read the sticky thread, you are sure to land on your feet. One sure thing in this line of business is collateral which you must be very smart about as some could sound nice but ended up being worthless. For a start just like what @Vod have said, you need an escrow on standby either to hold the collateral or value the collateral and there lots of people who can help with that if they can establish your genuineness.