It's going to be solely based on your needs and wants.
I have 2 upwardly mobile tech toys I use for signings other than my mobile (Note 8).
I use a iPad Pro and a Dell 2-n-1 (just a light weight laptop that folds in half to a tablet).
They both work great though I didn't think I would like the 2-in-1.
My main line of business is IT and I could not get comfortable using any Chromebook I tried. It's too limited for me
The 2-n-1 is Windows & touchscreen of course. I can run Linux, MacOS, and Chrome OS all on one machine as needed via VMWare.
If you want something you're likely to be more familiar with... 2-n-1. You can have the same software on it you would a desktop. Quickbooks? Instant invoicing if not using QB Online. Word? Excel? Outlook (that is actually functional)? Go 2-n-1.
If you're someone who manages her life on her cell and can truly do so... tablet.