Android - How to transfer installed apps from one account to another
There's currently no way to do this. Free apps can be re-downloaded under the appropriate account, of course, but Google has no provision for moving paid apps (or free ones, in bulk) from one account to another. The Google Play support page has their official stance on this:
At this time, it's not possible to transfer apps from one account to another.
Some developers are willing to issue refunds for purchases on old accounts if you repurchase the app(s) using a new account. You can always reach out to the developer of an app, and you can find their contact information by following these steps:
Visit Google Play and select the app in question
On the app's description page, scroll down to the Developer section
Find either an email address, phone number or website listed.
While you can't transfer apps, you can sync the appropriate email (with all the apps purchased) to multiple devices so you have access to the apps. Just be sure to DESELECT all the other things (gmail, calendar, etc.) so the only thing that is synched from that account is the apps (Google Play Store).