New construction, fully decked out on the design and amenities. purchase price 785K, 40K in seller credits, 120-140k gross rental projections What made you interested in investing in this type of deal?

And a few from 0% interest for a year credit card loans too.

Just trying to gather as much information and tips as i can

Not for a single airbnb like you are seeking (you and everyone else) but because if you start a BNB or a guest house or a hotel, you can get 40% of your investment back in the form of a tax CREDIT that you can sell for about 90 cents on the dollar. 

But they were selling an expensive house in California and had horrible credit.

Another possibility could be a home equity line of credit (HELOC), if you have sufficient equity in another propertyGood luck with your project!

Any guidance or tips would be greatly appreciated!

Rate will be highly dependent on loan size, credit score, LTV, location, and property type, as well as a few other factors.

@Michael Almand, for a full line-by-line breakdown and scope of work, my preferred contractor will charge about $250 to walk the property but will credit it back if he and his team are given the job.

Mostly from a home equity line of credit.