I've heard the newer Chromebooks can run android apps. Not sure how unless it's a touchscreen Chromebook.
I'd recommend a 2-in-1 chromebook like the Samsung chromebook Plus. It works well as both an android tablet as well as a notebook-like device.It is thin and light enough to be enjoyable as a tablet. It's a bit pricey though. Some of the other 2-in-1's work better as notebooks but not so well as tablets because they're thick and heavy.
The chromeOS and Android subsystems aren't fully integrated yet (Android filesystem is sandboxed and cannot access the internal storage nor any removable media.) The only area that is commonly accessible by both is the "Download" folder in the internal storage. so be aware of that when making a decision.
If you're leaning toward an Android tablet, I highly recommend taking a look at the Android version of the Lenovo Yoga Book. (I'm using it to type this post). Works great as a tablet and the Halo keyboard is like using an onscreen keyboard so when the keyboard is folded back to use it as a tablet, the back is smooth (like a traditional tablet) rather than feeling the keyboard.
They are currently selling brand new for $250-$299.... that's for a 10.1" Android tablet (4GB RAM/64GB storage), keyboard, and wacom stylus.