Google Profile Help

I am helping a friend (for free) build the online presence for his personal training business in TX. His company's setup is something I'm not super familiar with. He currently has his Google Profile tied to the LLC which handles the corporate business, while he does 80% of his business under a DBA which is basically just his name. He recently purchased a domain which is named after the DBA/ his name. I know use both names in his Google profile. Looking for suggestions on how to organize things going forward.. I have questions like.. Is it against any rules to have reviews for both 'businesses' go to the same Google Profile? Is it as simple as ensuring his website is co-branded and eventually organize the landing pages for each of the two businesses? Again this is a passion project of mine and I am gaining zero monetary value just looking to help a buddy out, thanks!