It would be odd/silly for this contingency to run all the way up until the closing date, but I don’t know how you guys do things there.At the least, I’d communicate with the sellers letting them know the sale of your house has fallen through and it seems highly unlikely you’d procure another buyer and close by your contract date....doing a mutual release now would be beneficial to the seller so they can get their house back on the market.

But, things change and life surprises us.Ask the seller if they will do Seller Financing or a Land Contract or a Wrap (and have a title report and have an attorney put the paperwork together for you.)

.,.)Here, there's a good chance that you may find a motivated seller(s).

I’m not saying this to brag just to say that when you demand a months rent deposit, you can bet I’ll argue against that lol.  

Unlikely you'll be able to increase the price and get the seller to commit to paying them. 

The ball is in the seller's court now.

You can use Find the Seller or similar but they will cost you form $7.50 - $25 based on how many searches you pre-buy.

Becuase there is a cost for even using your own money or private money, you can actually offer the seller more if its cheaper to do subject to, and give that extra to the seller.

However, the sellers are looking for a hard cash transaction.

The seller can obviously keep whatever earnest money you put down.