Try things like, calling, sending mail, dropping a letter off in the mailbox, getting additional contact info from the city for the property owner.if you have a log of the number of times and ways you have tried to contact the owner, you have grounds to have their insurance pay for any/all damages caused by the tree. 

Could the deal cause any rifts in your friendship?

The cause was an accidental electrical fire. 

@Rebecca Ramos, mobile homes are a great investment to put on land if he/she is planning on renting them out, if they are on their land they will appreciate in value and if they are in parks they do as well and the great thing about them being in a park is they are taxed like a vehicle which means they are very low, everybody loves to say they lose value, they have increased in value in parks and on land tons lately, I for one am glad people still believe this cause much less competition in this area of investing

I think it interesting the lenders (mostly F/F) mandate insurance, but not earthquake insurance even when you are close to significant earthquake faults.It is my personal view that if a big enough earthquake hits that it causes significant damage to many homes that it would be declared a disaster and cheap loans and options are likely to be available.It really is a calculated gamble.I have a fairly large umbrella policy.  

Usually adjustments in the tens or twenties will cause concern.

Water causes problems from deterioration to mold.

If so, I would notify the rep and then send the tenants an itemized bill including the cause of the repair.

Additionally, are there any conditions of the property that would cause my lender to pull their loan?

On larger multifamily it could potentially cause huge issues so it is nice to learn on smaller deals.