Vacant house on my block

[Amber Stevens]

There is a house on my block that has been vacant for about 2 years.  It was previously on the market and I thought it had sold but looked it up and it's still listed in Preforclosure.  I found the name and # of the owners.  How would I go about trying to purchase this house?  I don't want to wait until it goes to auction.  And here's the other twist...I already have a max of 4 conventional loans...how would I find private financing?