Just depends on various factors...if you are looking at it purely from an investment standpoint, I think it's just so-so.

I always want to do better than the stock market so I usually like to aim for 15% of my invested money, so in the example above they want 20% down, I would put in $60,000, but I better be making $9,000 PURE PROFIT.Yes land usually comes with the deal unless they state otherwise.Estimates get it at what you think is a fair price and minus the repairs that you think are needed.Always be negotiating, worse thing they say is no.This is how I've been going at it but then again I've only really been researching the topic for less than a week so take my advice with a grain of salt.

They are also a major amount of work, owning two homes, and something that is purely a emotional choice not a logical choice.Definatly not economical ... very expensive.

Get rid of old 9 volt smoke detectors and get the ones with the new lithium batteries that do t need changed for ten years .

Is it purely a psychological show of intent? 

Yes, we could keeps millions, but at the size we are today, we are certainly not hurting to make a profit, so this is purely a business decision.  

More importantly, a lot of those numbers would then be pure speculation.

Since the battery life is, in the ERL case, for 3 years, should I then have the cleaning service put in the new battery?

Pure gold, @Subbie Kaur!

.^ while that is purely speculative and may not happen, I see that happening....Overall I think the markets we have seen grow over the last 5-7 years will continue to have good performance as these workers rebalance across the nation with the newly allowed work from home culture happening.