I can't harbor resentment at those owners for "not being serious about selling" or "having an unreasonable expectation around the value of their property".

What assumptions are unrealistic/unreasonable?

Other times you will get family members who are misinformed on the value of the house (eg they live in an expensive market themselves, see the deceased's 4/2 1500 sq ft house in middle-of-nowhere Nebraska and think it should be worth what it would fetch in their own market) which then creates drama and unreasonable expectations.I would just be very confident in your ARV and rehab estimates.

Going to have to assume you eating this but you might be able to claim some unreasonable wear and tear back on the tenant

Jumping on the call strategy, it's not too unreasonable to call and be neighborly.

I have a neighbor next to me that is at the top of the market, has some unreasonable demands and simply continues to go through back up offer after back up offer.

If the eviction process is not done right then it could drag on for an unreasonable amount of time. 

Sounds like you were the one who was unreasonable in this situation.

Am I being unreasonable in my expectation to stay informed without having to ask every time?

Plus, it is not unreasonable that each house would clear about 300/month after expenses (including mortgage).