If you can do this and also keep your job, that's great. Personally, I would not feel comfortable forcing my employer to pay extra costs in order to accommodate me, even though the law can require the employer to bear these minimal costs. For the sake of my testimony as a disciple of the Lord, I would prefer to not exercise this legal right, and would pay for the extra costs myself, unless my employer voluntarily and cheerfully insisted on bearing the cost. If an employer was willing to accommodate me, I would want to find the solution which least disadvantages both of us. If my employer is willing to bear some minor inconvenience in order to accommodate me, then I should be willing to bear some minor inconvenience to keep the Sabbath.
Every situation is unique and has many factors to consider.
This is why it is important to pray before deciding whether or not to take your employer to court if he refuses to let you have the Sabbath off. If you do lose your job for the sake of obeying the Lord, the Lord will honor your sacrifice. In closing, always remember that you are not called to be a slave to your job. Although you are to treat your employer with honor and respect, your employer is not your Owner and Master. If you are a disciple of the Son of God, then He is your real Owner and Master.