My question is: when wholesaling, after finding a great deal, do you need real proof of funds to the get the property under contact or is there a way to get it under contract, find a buyer and complete a double closing/assign the right to sell without actually having the cash for the property? 

You can find cash buyers, right?

Either one of these people - the buyer, or the seller, can screw you, intentionally or unintentionally in years to come. 

Like I said I have the buyer ready to buy. 

Here’s the winning formula successful local house buyers and wholesalers use to connect with sellers, close deals, and create win-win solutions:Be Relentless: Show up every day with positivity and persistence.

I've done a number of seller financed deals as a buyer. 

However, purchasing the replacement property from an estate where your mother-in-law is the executor and other heirs are your wife's aunts and cousins raises potential related-party concerns under Section 1031(f).The IRS generally prohibits 1031 exchanges between related parties unless both the buyer and seller hold their respective properties for at least two years after the exchange.To stay compliant and avoid disqualification, ensure:The estate sells the property directly before any distributions to heirs.You hold the replacement property for at least two years.The transaction is conducted at fair market value with no prearranged agreements.Given the IRS scrutiny of related-party 1031 exchanges, consult a qualified CPA or 1031 exchange accommodator to structure the deal properly and avoid potential capital gains tax liabilities.This post does not create a CPA-Client relationship.

build, rent, refinance, repeat. different strategy but more scalable. land is a buyer's market in most cities in america with more than 6 months supply. in our market in columbus it's more than 12 months supply of land. no one is doing this strategy and you can customize your design to anything you want.

As mentioned above, have good comps.Take a look at the S8 list of available properties so you have an idea of what your prospects are coming from.

Every buyer wants some way to determine if they are being offered a fair deal.