LandLord Insurance vs Renters Insurance vs Home Owners Insurance

[Robert Treherne]

I've noticed a fair amount of crossover in the various insurances.

So my question (and the topic I'd like to open for discussion) is the pros and cons of each.
Is there any crossover, are multiple insurances needed or are some redundant, can multiple properties be put on the same policy for added value etc?

My particular case involves Renting out home(s) in the state of Alabama that are fully paid for but feel free to discuss other settings.