Apartments and mobile home parks share the same customer base, so the impact of a national recession is that it forces more people into a rental status, which benefits both sectors.

This is a good cost/benefit question. 

Other people also mentioned Southern NH, and Nashua and Salem are great cities with a reasonably easy commute to Lowell.Definitely do your research for two reasons: 1) NH residents get killed in property taxes but there are no sales or income taxes. 2) because of that lesser tax base, NH residents get significantly fewer benefits, including unemployment in the event of layoffs, etc.

If the Seattle area keeps growing, then no doubt, Tacoma will benefit.

An additional benefit is that his income earned by any interest paid is taxed lower than capital gains.

So the benefit to the investor (aside from being a good person and helping out the elderly!)

From that point you make the decision based off their value (essentially the benefits they offer - the cost.)This is not legal advice, just my opinion as a real estate investor.

You can only benefit from this exemption once every two years. 

Three are some programs which area specific which can benefit to first time home buyer but those program goes up to 2 units max.

I currently work in financial derivative compliance and regulation, so hopefully my specialized knowledge will be of benefit to the community at large.