Debian beginner questions/looking for a good rolling distro

[Linux for blind general discussion]

So, given Solus's apparent sudden demise...which pains me since I like 
the distro. I'm on the hunt for a decent, rolling distro


I've got Debian tessting atop my list.


So here's my questions


1. Is Debian testing as close to a rolling release as I'll get?


2. How easy is it to migrate from Solus to Debian, I want to reproduce 
my setup and workflow on Debian, i.e. i3, text editor, same terminal, et al


3. Besides Arch, is there another good distro I can use? My laptop 
doesn't get constant use however so I'm looking for something that is...


a. Stable


b. Can easily build orca-master and use it or has the latest Orca in its 
repos


c. Can be installed offline (because no ethernet port)


So any ideas on the above questions?