Is it advisable for a 30-year-old male, who has never been married before, to consider temporary marriage, or should he wait for a permanent marriage to avoid potential negative effects on his reputation?
Bismihi ta'ala
It's always best to focus on long-term goals, especially in settled down and building a family. Temporary marriage contracts could assist you in the physical sense, but in a lot of cases could also damage your reputation and minimise your motive for wanting to get married.
With high level of patience and strict discipline, you are able to avoid sin, and build your character to hopefully quickly get married.
My advice is to stay away from it, and concentrate on finding a good Muslimah for marriage, with dua to Allah ta'ala and tawassul to Ahlul Bayt (a.s.), in shaa Allah.
And Allah knows best