Your NOI is the same- but your cash on cash return just tanked.

I ride my bike about 100 miles a week in good weather, usually takes a tank full of gas.

Specialty tools and material needed to remove and install an new HVAC system:Refrigerant recovery machine - $750Refrigerant recovery tank - $100Cost to dispose of recovered refrigerant - up to $10,000 fine if not done properly - You will have to find a refrigerant reclaiming facility to work with you if you are not certifiedVacuum pump - $35025 lb tank R-410A refrigerant ( if you can find someone to sell it to you without proper cert ) $250Micron gauge - $150Refrigeration gauges ( cheap set ) - $100Nitrogen tank and regulator - $350These things alone put you over $2000 additional and that's assuming you already have the other necessities such as a torch, brazing supplies and piping tools.Keep in mind that if you don't know how to properly install a refrigeration piping system the result will be shortened equipment life.

Have you ever watched the TV show "Shark Tank"?

Your cash flow will of course tank but with a fat bank account who cares.Edit: I agree with your conclusion overall.  

Take a look at these graphs:https://www.trulia.com/real_estate/Pittsfield-Mass...What does it mean that the number of house sales have tanked?

Its what tanked our housing and banks a bit back and harmed all.

@Engelo Rumora  Happy to help but I draw the line letting newbie pilots scare the @### out of me.Get your basic training In a Cessna 172... my plane is a Cirrus SR 22  which is a hot rod and where you want to end up.. that's the only plane I would fly long distance over water.. ( that is single engine)  Google the  Cirrus parachute pull off of Maui on U Tube or how ever you guys get on those sites its totally cool to watch.. ferry pilot had his gas tank fail and he ran out of gas 150 miles from Maui.. not to worry pull the chute land softly  cruise ship near by sends tender and your eating lobster for dinner.. do that in a plane without a chute and your lobster food.

But wait, he tells me the one booked originally with the rehab account when we bought the house, we have to keep depreciating.I had the same problem with hot water tanks.

Long Beach is half a million population and has an economy independent of LA but is also part of LA county...Watch the economy tanks and I will eat my words.