Not possible.
WordPress and bbPress are two seperate things even if you could widgetize your bbpress, it would take time to let the wordpress plugins work as widgets in your bbPress.
To make bbPress look like your WordPress site, you need to create a bbPress theme to mimic the look and functionality of your WordPress theme. Widgets are not currently part of bbPress.
What does the topic title “monetize” have to do with any of this?