We've looked into some of the numbers regarding setting up a functioning field: Rental equipment, store/shop, compressed air supply, climate controlled storage for paintballs, liability insurance, staffing expenses, etc.

IE- more stable income, more tenant references, and the biggest reason-they are willing to pay an additional non refundable fee for their pet. 

Buying a one door house is way too expensive and you have to take on high insurance, plus cleanup risk after a hurricane (still shook from Irma).

Adding to what @Sam Shueh said, there are also insurances, Builder's Risk and Flood.

I received an insurance quote that I was hoping to get some feedback on (first time shopping for rental property insurance).I figure there are unnecessary items on here increasing the price, but I could be wrong.

I'm estimating property taxes and insurance at about $450 monthly. 

We had checked references and verified he was licensed, bonded and insured the first time we worked with him.

I'm getting bids from GC's (example: $6400, $6500) and found another guy off of facebook for $5400 (supposedly insured).

Does anyone know if E&O insurance will pay if an agent or broker is crazy enough to list a property for marijuana use?

I am interested in exploring other insurance company options for my 4unit building in Long Beach.