If your going to buy a Lake-house, I would buy my lake-house in Oklahoma not in Massachusetts because stocks are at all time highs. So lake houses in Oklahoma or Nebraska are probably much cheaper than in Massachusetts. You can get a Lamborghini dealership in Iowa because the farmers are going to be driving Lamborghini's in my view in the future.
For most people its probably best to buy an Index. Many studies have showed that an Index investing is far away the best way to invest in anything- stocks, bonds, currencies, commodities, anything else. And there are plenty of Exchange Traded products which make it very easy to invest in commodities.
Jim Rogers is a smart investor who co-founded the Quantum Fund with George Soros in 1973. By 1983 the fund gained more than 4000 percent.