If they refuse to sign the notice saying they will move within the 30 days time period would that suffice you think?

I also have a 10 inspection period.  

In wholesaling, you're typically dealing with non refundable earnest money and no option period contracts.

On the other head, this deal might work if you think the property will appreciate in value in a short period of time but I don't like speculative deals. 

After executing a contract with a seller and passing the inspection period the title search turned up a second mortgage that puts the seller under water on the property by something in the neighborhood of $50k.The contract was in Florida done AS-IS.Do I have any ability to force the sale to be completed and acquire a clean title?  

since you'll have a much lower interest rate during the initial period meaning less out of pocket and much more of each payment going to pay the principle.

You will need a portfolio lender, who will typically have a shorter term loan period.

They are not getting any easier either.The 45 day identification period is hard and fast, miss that date and you have a fatal flaw for the exchange. 

I haven't sold my existing investment property yet (fingers crossed for a closing next week), so the 45-day identification period hasn't officially started, but I'm trying to formulate my strategy to make sure I make the most of it.What are your best approaches to "buy right" so to speak when you're up against the 1031 clock and battling a competitive market?

I reviewed their folder and discovered they had bounced checks at least a dozen times in that 11 year period, so I wasn't optimistic.When I called the tenant to schedule an inspection, it took many phone calls over a two-week period before they responded.