A 1031 Exchange is a very formal process with a licensed intermediary and the IRS watching closely.

However to get the tax deferral of the 1031 exchange there must be a qualified intermediary in place prior to the closing of the sale. 

If there’s $220k mort left on the house then I’d have approx $280k in cash to work with that would go to the 1031 intermediary.

I don't need a full time bookkeeper and need an intermediary solution that doesn't cost $100/hour.

And so we continue to have intermediaries.

It doesn't matter what service you're pulling your lists from, places like listsource, usleadsource, salesgenie and the like are really just the intermediary.

You start a 1031 exchange (which will defer all tax and depreciation on gain) by selling a property with a qualified intermediary in place to document and manage the 1031 process.From the date of sale as @Christopher Phillips said you have 45 more days to identify potential replacements and after that an additional 135 days (180 total for those with slow calculators) to complete the process.  

The seller must trade equal or up in value, invest all equity from the sale and replace the debt, follow specific deadlines, enlist the help of a Qualified Intermediary to provide advice, prepare 1031 Exchange documents, and also hold the funds from the sale.

The identification must be in writing, signed by you and delivered to a person involved in the exchange like the seller of the replacement property or the qualified intermediary.

Anything less may not protect you when or if they issue a chargeback request to their bank (or the intermediary like Chase, Venmo, or Paypal).For tenants that do not have a bank account.