It looks like my best and cheapest option is to get a prepaid phone. The phone is around $100 and the monthly fee will be $15. A home phone is way more expensive.In the same boat, but building on Payhip. I'm going to get a cheap separate phone for business.
I find dual sims are irritating.
I'm going to just get a separate prepaid cell phone.just get a new simcard with a different number and top it up with credit or pay monthly for the new number, if topping up credit won't do it.