Bought in 2018 for $491K and his it's easily worth $620k.

My question, is adding a ADU to the front property, already has a single family home on it, worth the cost of the build, how much value would the ADU add to the overall value of the property?

Just my $0.02 worth.

It may also be worth reconsidering getting your RE license depending on what you are looking to do. 

Around here, this is not feasible.I'm lucky to make about 120k/year, have a condo worth 550k and have about 40k liquid, but this still keeps me out of the running.Those of you who managed to invest here, where did you start and where did you have success? 

You'd just have to ask if these influence the carriers premium, and by how much to see if they're even worth consideration.  

How much is the free and clear property worth ? 

The only thing of value they left behind was a small trailer and car (worth under $5k together).

Worth area.

BUT it will likely take a while as you are experiencing.So you have to ask yourself, is the difference in rent worth the additional months of vacancy?