On an average, the expenses may vary between €7,000 and €11,000 per year.
No, International Non-EU students can’t study part time in Ireland as they have to complete a minimum of 15 hours scheduled contact time per week to be eligible for a visa to study in Ireland.
Students are allowed to work part-time (up to 20 hours a week) or full-time (up to 40 hours a week) during vacation.
Yes, you will be required to get the Police Clearance Certificate from Passport office.
Students from non-EU countries, must have a medical insurance in order to be granted a study visa.
U.S. universities require an English language proficiency test before admission and the test requirements vary depending on the course you apply for.

Ireland provides 24 months stay back option to international students pursuing master’s program and those pursuing bachelors are entitled to a stay back option of 6 months to one year.
No, spouse can not apply as dependent with the student visa of the main applicant. There is no student dependent visa category available in Ireland.