Every now and then you can find a gem, but it isn't easy. 

Any hidden pros/cons?

Engage with local officers to gather insights about the neighborhood, and don't hesitate to ask them specific questions about the property.When touring, pay attention to tonality, body language, and hidden cues from sellers.

Ranges are fairly easy to test and have far less likelihood of hidden problems.

Sort of a hidden cost, but still a cost to you.

He claims that in a spare bedroom, which was hidden by a bed, when he moved the bed out he discovered an extremely raised section of the hardwood floors.

There are so many hidden and fully disclosed fees by the insurance companies that it is impossible to beat the following strategy that I ended up doing and will share with you below: 1) I put a single tenant commercial property under contract with a 45 day due diligence (to inspect the property with no obligation to purchase it) 2) I contacted national tenants (I follow a very specific system) and got one committed to lease the space for 10 years with a NNN lease (NNN means: Tenant pays the lease plus taxes, insurance and maintenance) and a corporate guarantee (lease is guaranteed for the duration and backed by their financing bank like Wells Fargo) and they asked me to spend some money to offset some of their TI (Tenant Improvement for the location) 3) I took the cash I was going to put in to buy in full a WL insurance and instead I just put it as a downpayment for a 20 year commercial loan at very low interest rate and I used some of the money left over to pay for the TI/rehab cost to improve the single tenant retail property as agreed with the national tenant. 4) After we signed the lease the property went up in value from $850k (when it was vacant under contract) to $1.5Mil (with the national tenant in it with the NNN 10 year lease with the corporate guarantee and escalations) 5) My cash on cash was very high and helped me afford double the life insurance coverage for a lower premium because I got instead a level term life insurance with guaranteed sane premium for 20 years) 6) Once the 20 years are over, the loan would be paid off, I would still have the building at even higher value and the rent would easily be at least double what it was when I started 7) I did this approximately 4 years ago and a few weeks ago I refinanced the property and cashed out all the money I had put in, plus some, and I compared my strategy to those whom I know that went for the WL insurance coverage and the financial difference is huge due to the insurance fees, the limitations on what can be borrowed and limitations on income etc etc You can do the same with other type of properties of course.

Hidden problems with the sewer line can be costly to fix later on.

This is a rare gem that seems almost surreal in Coastal CA.

In my opinion, the disclosure should be in a separate document that is incorporated into the contract and not hidden amongst a multitude of other provisions.