I'd prepare drawings showing dimensions, locate outlets for example electric, water, and gas) drawn in, etc. 

And a cashed check and deposit into your account.   

@Ryan Biankowski That amount of money in cash could serve as the down payment on a potential flip.

I have quite a bit of cash in my high yields savings and about 300k in my 401k/IRA portfolio (how much is actually mine vs IRS after management fees I have no idea.)  

I also use the system from this book to manage cash and find it very useful.https://a.co/d/1tnzkhy

I recommend this book which is amount how to manage your cash.

This question was for advice geared towards an individual not looking to create a ton of cash-flow, apologies.

What's the best way to beat an all cash offer as is with no contingencies and a quick closing?  

In the industry this is most commonly known as a "Fix and Flip" Loan.We are correspondents with dozens of lenders who offer this type of loan.Most commonly, the loan will cap out at 75% of the ARV (But Investors do need cash, this is not a 100% financed transaction)75% has to include the purchase price and the rahab amount requested.The terms can vary greatly.The two most important areas that will impact the terms the most is 1.

Purchase price: $115,000 Cash invested: $35,000 Sale price: $240,000 Move in ready, fully renovated townhouse, 2 bedrooms with 2 1/2 bathrooms and ample closet space including walk-in closets in each master bedroom.