Diamond in the Ruff!!!

I think I got one working buy would be great to get input on how I should go about this project. This is a 4bed 2bath home 1626sqft. sitting on 18351sq.ft here on the island of Maui. This is a distressed short-sale. I have a end buyer who has $20000 down with great credit but is self-employed so she needs a stated income loan which "she" has been unlucky finding. The property is beautiful, it has a green house with waterfall features in a fishpond. Sliding french doors, wood floors, fireplace..and is located in the country buy not far from schools, stores, I mean this house would actually be a keeper for me but I am just getting started so I know later as I learn and buy more and make more money I can buy later. Anyways it will go on the auction block next month. So here are the numbers. It started at $480,000, then went down to $429,000. Zestimate is $583,000 and from a very reliable source that I have they are willing to take $350,000. Million dollar question is, what would be the best financing availble for this, and if I did use like coastal funding for this, is $350,000 good or shoudl I go lower? I just don't want to lose this deal. Very hard to come by here in Hawaii where the average home here on Maui is still at $610,000. Okay opened for any input from my DG Family..