A fter two years of doing their own back-breaking yard work on their acre-and-a-half property in Cold Spring, N.Y., Renata Kero and her husband were ready to finally give in and spend a few thousand dollars to hire a landscaping company. Then they started re-thinking the purchase, given the uncertainty roiling the economy. Tariffs are being levied and reversed . The federal government is cutting jobs across the country. The stock market is historically volatile. It seemed like any kind of big