People with good credit scores can even be denied.

Before you get too far, I would go talk to every local bank and credit union in the area you want to do this. 

and how well my credit score will be?

Does anyone utilize a line of credit as an emergency fund?

Your best bet for that size will be local banks and credit unions, good luck.

Nice try, but no cigar.3rd warning: only paid stays count, and only full-price stays, not discounted favors for friends and family.

As mentioned seller credits are the best path as title insurance and taxes are pretty much fixed.

We have credit scores over 730 and have been "soft approved" for around $750k. 

The seller doesn’t need to know that the underwriters may give you more of a hassle than other buyers.Or do you have lines of credit or a private lender so you can make a “cash” offer then try to get the financing through before close or at worst just do a cash out refi after close?

If those two things are in your favor, you will do well.