I insisted we use a title company or the transaction can't move forward. 

The city insisted the owner is responsible.  

I have heard, but I don't have first hand knowledge, that some banks insist on language that the property cannot be resold within 90 days of closing for more than 120% of the sale price.

They will insist, correctly, that your offer reflect the financing that you are using.

This is the part I keep trying to point out to you but, as Bill pointed out, you're insistent on conflating annualized and total rates of return when comparing investments.

My neighbor eventually informed me that since he wasn't trying to upset me, it wasn't his problem when I got upset over his noise (which often occurred late at night).Because the owner was a large corporation and wanted everything thoroughly documented, I then had the challenge of getting independent third-party verification.It took me awhile to get my ducks in a row and although the apartment manager tried working with my neighbor (through verbal and written warnings), he continued to insist that his noise wasn't his problem.

Once I insisted on pay stubs it was clear that they normally work about 5 to 6 hrs a week. 

Probably what your friend could do is ask for compensation or insist that the landlord stick within the bounds of what is allowed in CA.

I would insist on 6 months minimum and ideally use it as a renewal incentive. 

.), you just cannot insist that their income comes from a job because that would discriminate against the disabled (who get money from disability insurance instead of a job), the retired/elderly (who get money from SS or pensions), etc.Not a lawyer, not legal advice.