The system produced acetylene gas which was used for lights, cooking, and sometimes hot water.  

Perhaps an "Editors Hot Property Pick" of the week or month, your property or not, may be best.

It doesn't even heat the water-- you just add hot water.Paying some guy under $100 is much easier.I wouldn't put hardwood in a college rental.

Dreams of savings down the road go away when they factor in the additional mortgage cost created by that extra upfront cost.When I was still building in Northern Idaho and put in energy efficient devices advertising them was a negative and several asked if I would take out the non traditional high efficiency tankless hot water heating system.I build to green certification standards but I am  not willing to pay the inspector for certifying them green especially since he had to approve the plans for the homes to be built.I wish you much luck and support your intent but the reality, at least in my experience, is people are willing to talk about being green but won't pay extra or go out of there way to be green if there is even the slightest hindrance to their life style.  

If at least the domestic hot water run to each unit is separate, you will be able to place the cost with each individual tenant.

That may give you a clearer idea of how hot the renting market is

Arlington is a HOT market right now!

What I have seen is people indicted in these cases.There are many unscrupulous (unlicensed brokers) who have ended up in serious hot water.As far as CA and many other States, one can NOT be compensated for such a deal, if they are indeed NOT a licensed RE Broker in the specific State, or an Attorney.IMO, now is NOT the time to be walking a fine line in this industry.Jonathan Goldstein Esq.DISCLOSRE:Any information expressed is not intended as legal advice and does not establish any attorney-client relationship.

I wouldn't abandoned it just because a bunch of immature hot heads spat off at the mouth.Don't take things so seriously,

How about your hot stock tip?