I try to find out what expenses can be eliminated, decreased or offloaded to the tenant instead of just rely on rent hikes 

Bad snow (no snow or less snow than normal) = less bookings and lower rates due to decreased ski demand. 

As you pay down the principal the portion of your payment attributable to interest will decrease. 

When negotiating, did the renovation credits decrease your final purchase price and your monthly payment terms?

Quote from @Kevin Sobilo: I plan to find a couple of comparable properties with different zoning to demonstrate how zoning increases/decreases value.

That can decrease your buying pool.As a flipper, your ideal buyer should be somebody represented by an agent buying your home.

Just make sure you collect more data before making a decision.Thank you for the feedback,They actually decreased the rent from from 1150 to 1125 in the last month.

Californians population has been decreasing slightly, CA lost a seat in congress.

So in essence unless your going to fight (and pay) for a fair return against a fascist Oakland rent administrators - your profits will slowly decrease.

They're paid by the job and if their performance ever decreases (which can happen - they're great for a time and eventually for whatever reason their quality, timeliness, etc declines) then it's easier to phase them out & replace them with a different crew.