What are my options for obtaining a Non-B visa for employment in Thailand, and do I need to leave the country every 90 days?

Non-B visa (employment) question.

Currently in the US (LA Consulate jurisdiction). Have an offer for a job in Phuket. The employer is currently working on the work permit paperwork I'll need to submit through the e-visa portal.

On the LA Consulate website there is both a 90-day option ($80) and a 1 year option ($200).

My plan is to work high season for about 5 months.

My understanding is that near the 90 day mark I'll need to leave the country (she said go-to Malaysia) and re-apply for another 90 day visa. She made it sound like it's a one-day process. Does this sound correct?

She also said don't bother with the 1 year option as "they never get approved and it's a waste of money". Any thoughts here on why this option is more difficult?

If I could get the 1 year Non-B visa would that preclude me from having to leave the country at 90 days, or is the exit/entry still required on a 1 year Non-B visa also?

Just trying to understand the options.

Thanks in advance!