In the entertainment industry, a small office might have an administrative assistant that works hourly in the office for say 35 hours a week, then travels as a personal assistant during a weekend concert gig - say from Friday morning, returning on Sunday afternoon. Alternatively, the person may be paid salary for 35 hours per week in the office and then a daily lump sum - are there implications for overtime in this situation? What is the best arrangement for employer, and employee? Per diem?

I am sorry I was not able to fully understand your question but as far I have understand I think their should b no limit of working hours it can be 10 or it also can be hundred depending upon the number of events, only the rate of one hour should be defined it will be simple while calculating the salary at the end of the week or month you just have to pay for the recorded hours no matter how many

If you pay hourly then you have to include all hours worked. If you pay salaried, then you may be able to classify the personal assistant stuff as contract work and pay that on a 1099 basis. Per diems are supposed to cover expenses not compensation for work done.

I would certainly check with your accountants about how best to work this.