How much is the travel allowance for per diem positions? And no health insurance even if you work as many hours as a part-time employee?

I’m being offered a per diem position with a one hour minimum per shift in a U.S. state where I believe employers are supposed to provide health insurance to their employees. HR told me that since it is a per diem position no health insurance is provided. I was also told that a travel allowance is on the table for the commute from home to the place of work. How much do employees get for travel reimbursement in similar situations? Also, should per diem employees receive at least partial health insurance benefits if they were to consistently work as many hours as a part-time employee? Thank you in advance for any insight you might have!