I can understand there are occasions where your client gets laid off suddenly and therefore can't buy a house, but overall it seems once you've secured a client and they sign a contract with you what else would prevent this sale?

Rare occasions you will see missed payments but I have not heard eviction issues.I am also in the market like you.

I've had the pleasure of working with the Navy on multiple occasions.  

Our other tenants pay the rent online, by auto-debit, and on occasion that transaction has failed to clear due to NSF. 

I have lived in Austin on two different occasions for over 10 years now and run a real estate investment company out here as well as hold my own income property here.  

Find good deals, Buy, and Sell, and on occasion (when it is "easy") just assign contracts.

Call them on occasion to ensure that you are on their list. 

On a rare occasion, I will allow our maintenance team to show a unit if they are close by. 

On the rare occasions when I do, they are fine after I explain how many people we have been able to help.Just keep everything professional and you will be fine.Sharon

Everyone who has ever gone against that advice (my relatives on 2 separate occasions) have lost their money and spent a fortune on aspirin.