My timeline is still up in the air, but I'll be able to pull the trigger one day. 

For the duration of the lease-option the property stays in the sellers name, so it should not trigger a "due on sale" for the mortgage, until the option is exercised. 

It would most likely trigger the due on sale clause.A scenario that may work though is if the amount remaining on their mortgage is less than what you are willing to offer as a down payment or they were willing to pony up the difference.

EvolvedProperty is somewhat vague and doesn't automatically trigger thoughts of a home sale.

I Have read many books and taken a few courses with a local investor in my town and feel my next step is to pull the trigger and make a move. 

Pulling the trigger on that first deal can be difficult, but once it's done you'll be hungry for more.

Thanks to this wonderful community and all you wonderful people over the past few months my wife and I have gained the confidence to pull the trigger on this exciting adventure.  

And if so, doesn't that trigger DOS?

Honestly if you still have these questions as your about to pull the trigger then you're not ready to pull the trigger.  

I waited until I knew enough about investing, to reduce my risk, before I pulled the trigger and made my first purchase.I'm taking massive action to acquire properties over the next 5-6 years and take advantage of the low interest rates.