Phone Number for Local Seo Site?

I'm building my first local seo site, I plan on selling leads later on, how would you guys go about setting up a location and phone number for the business? (NAP)

I live in USA so I was thinking about using google voice number but not sure if it the best way because I will need to use the GVN to setup citations as well, any advice? Thank you.

I'm using Twilio and I can recommend it.