Paul worked very hard at Thessalonica at his profession (tentmaking) so that he would not be a financial burden to the church while he was there. The church at Philippi had sent Paul financial assistance when he was working in Thessalonica (Phil 4:15); perhaps the financial assistance from Philippi was at the beginning of his ministry, functioning as “seed money” allowing Paul to rent a shop and purchase raw materials. Although shops sometimes were open in the late afternoon for more leisurely browsing, the average Roman merchant worked intensely in the six hours before noon and then closed the shop. Daylight was the main requirement for conducting business; hours would be longer in the summer and shorter in the winter. Paul reminds the church that he even worked when most places were closed for the evening. By using the plural “we,” he implies that Timothy and Silas worked with him. This would have been a good model of Gentile-Jewish cooperation for Thessalonian believers and may have been part of the reason the Jews in the city were upset with him. He also may have “outworked” the competition, and financial envy perhaps contributed to opposition to the apostle.ESV Archaeology Study Bible, p. 1779
Living in Central Asia, where the bazaar/market is a prominent feature of every city, Paul keeping his shop open after the others have closed is a vivid picture – and a challenging example. These notes on this passage (1 Thess 2:9) are helpful biblical background when considering the issues of contemporary tent-making and supporting locals.