If you use energy efficient toilets you may be eligible for reimbursement under your county programTip #15: Read books such as Multi-family millionsTip#16: Try to keep tenants for minimum of 2 years.

Nevertheless, I want to be more focused, efficient, and profitable in my real estate investing (you could say I have a burning desire to do so).

I am looking into more efficient electric heat.

Ok, so any suggestions on how best to solve these issues:This property is a triplex (maybe quad with an efficiency), converted from a SFR, so it's got one hot water heater for the whole building, and one temperature control (hot water / steam radiant heating) for the whole building located in the second unit.I'm thinking the cheapest way to provide enough hot water to the whole building is to replace the hot water heater with a 200 first hour rating hot water heater so I don't have to mess with the plumbing too much.For the heat, I don't know if it's easy enough to separate the heat out to each unit, if not, my thought was to just leave the temp at say 62, and not give them access to the temp control, and let them get space heaters to make up the difference.

Any time loss you will be made up because you be more relax, efficient, and effective while getting as good or better results.  

Investing is simple and efficient.

Getting back to tiny houses...I find their efficiency fascinating and I think there are absolutely niche uses for them that could develop into lasting trends - second homes, first homes for unmarried or recently married couples, student housing - but it seems hard to see them meeting the needs and desires of most american families long term.

There are several big realtors and home builders here in Houston that are quite active on radio and TV.If you're trying to hit individuals who are in the market to buy or sell now, it's not very efficient because only a small percentage of the people who hear your message have any interest in buying or selling a home at that moment.All of that assumes you're buying time on a large mass-appeal radio station with a market-wide audience.

It just seems it would be a lot more efficient because I know what I'm looking for.

I definitely agree with Jim on those other free and cost efficient forms of marketing, to be successful in this niche you will definitely need to keep a marketing budget avalable....