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. 

I personally like dark hardwood, but they present maintenance issues... dust and dirt, pet hair, scratching, etc.

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.

My first deal had some hair on it (required substantial rehab, inherited existing tenants, required city approval to reconfigure), but was a great experience that I would do again and again!

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.  

Similar enough that it's like splitting hairs which one you decide to invest in.

And if so, doesn't that trigger DOS?