Found a possible first SFR. Need advice.

[Rory Fowler]

As my wife and I have been getting out of debt (we are finally) and saving for our first investment property, there is a house I've been keeping an eye on near our neighborhood. I drive by the house every day and I've never seen a person there in seven years. But the yard and house are kept up and there is still a few pieces of furniture in it.  We are where we need to be financially to take the leap so yesterday I began investigating the ownership of the house. It was quit claim deeded to two sons in 2007 with a life estate until the mother's death. My investigation revealed she died in December 2014. But the house has not been put up for sale. All taxes are current and there are no liens.  The two sons are in their 60s and live in the metro area where the house is located. The probate records show no mortgages tied to either brothers' names.  It is a 3/2 with a single garage. Comps in the area sell for $150K-189K (I have no intention of paying that much) and rent for $1200-1500 depending on updates and overall condition. The house was built in 1960.  It is a highly desirable area to live in the Birmingham area with extremely good schools and very family friendly culture. Appreciation rates are starting to pick up steam again in this area. I intend on being very patient in finding a good deal on our first property but this one seems to be a good candidate. So here are my questions:

1. I have the address of one son where the tax bill goes. Should I knock on his door and speak with him in person or write him a letter?

2. If they are interested in selling and the house is paid for, wouldn't this be a prime opportunity for owner financing? Is it unreasonable to ask if they would be interested in financing it to me? It seems this would be an good opportunity for them considering the age of the two brothers who own it. 

I'm hoping your answers and comments will create more questions for me. Thanks.