The idea is that if you had, maybe injury or an emergency where you can’t deal with the day to day,  you can hand over management and still have cash flow if the numbers work. 3. 

"The policy protects you against lawsuits for injuries and property damage that occur during a trip."3) For sure4) Not sure, but for me the fun/economy factor is the kicker here.  

General Liability  is for Bodily Injury and Property damage you cause by your operations. 

Most likely the state where the property is located is where lawsuits would be brought if they are something for personal injury like a trip and fall or something of that nature because the “cause of action” arose in that state.

(all of them are $1 million personal injury, $1000 deductible).  

The real potential problem with a mastiff of that age is not the injury it could cause to a person, but to the damage it could do to the property.They do loose bladder function as they age, and they have a large bladder. 

Most companies offer $1 million and some are starting to offer up to $2 million for primary liability.Along the lines of liability ask about personal injury coverage - getting sued for wrongful eviction or for declining to rent to someone because of discriminatory reasons.Loss of Rent coverage - if property is damaged and tenants move out you lose the rental income while repairs are being made.

At least with the 30 yr, you give yourself flexibility and increased margins in case anything goes sideways in the future (loss of job, injury resulting in being out of work, major unplanned expenses with rental homes, medical bills etc). 

Policy will also contain other provisions for injuries, etc.

Yet, there are four exclusions specified - including personal injury.