The cost for mobile offices and construction trailers can be figured out here with just a few steps. There are advantages of renting mobile office construction trailers and there are advantages of buying job-site trailers and what’s right for you will be based on the overall cost for your specific needs. Naturally if you only need a portable office trailer for a short period of time then the best price option will be in a rental, however if your company is continuously involved in construction projects then it would be wise to consider a mobile office trailer.