Do not scale quickly because someone writes about it in a book. 

Anytime I write an extension there is an escalating rate for overstays (that is because summer rentals in the area go for higher weekly rates). 

In terms of partnerships, LLCs are great as you (read as "your lawyer") can write dispute resolution tools and processes into the operating agrement.

Some companies will include the Liability while others write it as a separate policy.

As an alternative, there are some programs that can write a $2M$4M General Liability on the property. 

If you plan to make any repairs or rehab, get all estimates and quotes from your contractor in writing.

Don't ask in writing, have it be a chat.

Jim you should write a book about your adventures in landlording, I would absolutely read that.

Talk to your insurance broke in writing (email/text).

They will look at the K-1 and potentially ask to see the partnership return depending on your ownership % in the LLC.There are certain things lenders/brokers add back such as depreciation and one-time write-offs(roofs, HVAC, etc).Best of luck.