Using source packages to bring some programs up to latest version

[David Niklas <doark@mail.com>]

Hello,
I've used Debian on and off but now I have a pocketchip from
https://nextthing.co/
and it uses debian and I'm not about to switch.
I follow several projects closely (nano, lynx, a few others), and what I
want to do is to tell apt to:
1. Download the latest and greatest source code of version of package X
2. Resolve all dependencies of package X downloading source code
3. Resolve packages that depend on X and download source code
4. Compile sources and install X and dependencies.

I realize that several of theses steps may make up one actual command and
visa-versa.
What I'm trying to do is to avoid running pieces unstable or testing
software (except for the package I asked for (such as nano)), while
still having a few newer packages.

Thanks,
David