By TheStreet Guest Contributor It’s a question every growing business eventually faces: Do we buy it or do we build it? The pros and cons of outsourcing. By Ben Slater It’s a question every growing business eventually faces: Do we buy it or do we build it? To meet client demands and create economies of scale, companies like Apple (AAPL) – Get Apple Inc. Report, Amazon (AMZN) – Get Amazon.com, Inc. Report, Netflix (NFLX) – Get Netflix, Inc. Report, and Microsoft (MSFT) – Get Microsoft Corporation Report all buy some of their services. Conventional wisdom mandates that a modern company only buil…