Also a free business. site is also good to add, just create it in GMB; it will eventually rank. I never added any links to any of them for the ones i used as an extra website, also never added it to gmb as website. In recent google update in november it started popping up. For some of my lazy lead gen works (that did use GMB as a main website) i have used to build links and they do rank as well, actually easier