Hey Kevin,
A couple thoughts...like @Account Closed said, you probably want to account for PM and CapEx up front. Assuming I did my sleuthing as well as I think I did, based on the current state of the property as well as the neighborhood, I would account for double the annual repairs you have listed.
On the other side of things, I think your rent estimates are fairly conservative and I'd think you could get $1,300+ for the 2BD units. This is my opinion and just something to consider rather than me encouraging you to change your projections.
Lastly, based on the listing (without having spoken to anyone), I see no reason not to come in with a low offer, particularly as it's an estate sale, it's been listed a long time, and there haven't been any price drops. For what it's worth, with the information I have now, I'd probably come in around $250k and try to negotiate them down to ~$300k (don't forget, you make your money when you buy). Beforehand, I'd reach out to the listing agent and set up an appointment. After you've viewed the property and tightened up your rehab estimate...ask if they've received any offers and try to dig for whatever information he will share. The listing agent is likely a court assigned real estate agent and just wants to get the property sold. The family might jump on any offer they receive at this point.