In series also eliminates any issues of balancing the outputs from the tanks as required by code.Good advice is when adding a 2nd heater no matter how you do it, to have it plumbed with a by-pass, so that if one heater dies you by-pass it and can replace it at your leisure.

All are valid points, and at the end of the day - if you are looking into a Real Estate Investment business without the hassles of tenants, toilets and trash, then Self-Storage is hands down the most profitable sector of all Commercial Real Estate Sectors.  

The biggest sectors of Philadelphia's economy are education and healthcare, so with its close proximity to both UPenn and Drexel, and an easy commute into center city; I see it as a desirable place to live, that will always have student rental demand and can cash flow reasonably from day 1(although you may need to look on the outskirts a bit).

We are debasing the value of the debt we owe to our creditors, slowing the Chinese economy (detering imports), promoting exprots and our manufacturing sector - which we desperately need and encouraging investment rather than saving.It also makes foreign direct investment in the US more attractive to overseas investors rahter than buying our debt.The dollar will likely decrease further and remain low for sometime but it will come back.

If the refinance loans promised to borrowers were not available in the future -- well, that wasn't the mortgage lender's problem. http://www.responsiblelending.org/media-center/press-releases/archives/spin-and-outright-lies-on-cause-of-economic-crisis.htmlBUT HERE IS WHAT DUBYA'S GROUP SAID IN 2008:'The "turmoil in financial markets clearly was triggered by a dramatic weakening of underwriting standards for U.S. subprime mortgages, beginning in late 2004 and extending into 2007," the President's Working Group on Financial Marketshttp://www.mcclatchydc.com/2008/10/12/53802/private-sector-loans-not-fannie.html#ixzz1UC8M7o1g

From the wholesaling sector to the flipping.

Here, you can spend your leisure time reading a book or simply relaxing.

Then I'll sell it to google or facebook for $97,000,000,000,000,000,000 The longer I'm involved in business, regardless of the sector, the more due diligence I do on all clients, employees, subs, vendors, transactions, contracts...

Usually these products will range in sector, estimated hold times, leverage amounts, expected returns, etc..

I got into the area for some of the same reasons you mentioned (diverse set of sectors, some population growth, and lower price points & better cap rate than my home market).