The economy may be adding jobs, but most new jobs are at the low end of the pay scale, according to Forbes; inflation-adjusted earnings for the average worker actually has not increased in the last ten years. As a result, demand for rentals — both single-family and apartments — will continue to remain high. Real estate investors should concentrate on properties where asking rent does not rise above 25 percent of the average rent, according to Ingo Winzer of Local Market Monitor. That’s where you’ll find the largest concentration of …