biblatex style with just commas and date at the end?

Question

I have a very basic question. I need to have a biblatex style that fits the requirements from a French publisher. In a nutshell :

• mostly commas between elements of the reference, no points, no colons.
• date at the end (no brackets around the date)
• no "in: " before journal names
• extensive use of op. cit and ibid. (not ibidem) for repeated citations.
• note style (= complete references in first occurrences)

Typically, for a book : Name, First name, Title, Address, Publisher,date.

So, unless I'm wrong, it needs to be one of the verbose styles but I am at a loss for find one that would do that "out of the box". I have read the ext-verbose doc and can see ways of achieving the result, but there might a more immediate solution in the available styles. I'd much appreciate your input if you think of something I have not seen! Thanks in advance!

Or, alternatively, should I consider tweaking one of the ext-verbose styles, by renewing commands in the preamble, in order to achieve that?

Best regards, M

——- Edit 1 : here is my MWE ; the bib file is the standard one. (http://mirrors.ctan.org/macros/latex/contrib/biblatex/doc/examples/biblatex-examples.bib) The renewcommand newunitpunct works for most of the fields, the macro is the one that was suggested by @moewe elsewhere

\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[french]{babel}
\usepackage{csquotes}
\usepackage[style=verbose-trad3,backend=biber]{biblatex}
\addbibresource{biblatex-examples.bib}
% I left the generic settings and added a newunitpunct instruction:
\newcommand{\cmd}[1]{\texttt{\textbackslash #1}}
\renewcommand{\newunitpunct}{\addcomma\space}
% the following to replace colons by commas between address and publisher, I'm not sure it's right this way :
\renewbibmacro*{publisher+location+date}{%from standard.bbx
    \printlist{location}%
    \iflistundef{publisher}
    {\setunit*{\addcomma\space}}
    {\setunit*{\addcomma\space}}%instead of \addcolon\space
    \printlist{publisher}%
    \setunit*{\addcomma\space}%
    \usebibmacro{date}%
    \newunit}
\begin{document}
\section*{\cmd{footcite} examples}
% The initial citation of an entry includes all the data.
This is just filler text.\footcite{aristotle:anima}
This is just filler text.\footcite{averroes/bland}
This is just filler text.\footcite[26]{aristotle:anima}
This is just filler text.\footcite[59--61]{averroes/bland}
This is just filler text.\footcite{aristotle:anima}
This is just filler text.\footcite{aristotle:anima}
This is just filler text.\footcite[25]{aristotle:anima}
This is just filler text.\footcite[25]{aristotle:anima}
\clearpage
This is just filler text.\footcite{kant:kpv}
This is just filler text.\footcite{kant:ku}
This is just filler text.\footcite[24]{kant:kpv}
This is just filler text.\footcite[59--63]{kant:ku}
\clearpage
\section*{\cmd{autocite} examples}
This is just filler text \autocite{aristotle:rhetoric}.
This is just filler text \autocite{averroes/bland}.
This is just filler text \autocite{aristotle:anima}.
This is just filler text \autocite[55]{aristotle:anima}.
This is just filler text \autocite[55]{aristotle:anima}.
\clearpage
\printshorthands
\printbibliography
\end{document}

——-- Edit2 (and sorry I had posted the new edit as an answer!)

Thanks for your helpful comments! It might not be "nice" in terms of coding, but I achieve most of what was wanted with the following redefinitions, on the ext-verbose-trad3 style. I still use the standard bib file http://mirrors.ctan.org/macros/latex/contrib/biblatex/doc/examples/biblatex-examples.bib and I have reduced my MWE, and updated with moewe's helpful suggestions. If you see errors I have not seen, please let me know!

\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[french]{babel}
\usepackage{csquotes}
\usepackage[style=ext-verbose-trad3,backend=biber, articlein=false]{biblatex}
\addbibresource{biblatex-examples.bib}
% specific settings:
\DeclareFieldFormat{biblabeldate}{#1}
\DeclareDelimFormat[bib]{nameyeardelim}{\addperiod\space}
\DeclareFieldFormat{issuedate}{#1}
\renewcommand{\volnumdatedelim}{\addcomma\space}
\renewcommand{\newunitpunct}{\addcomma\space}
\renewcommand{\locpubdelim}{\addcoma\space}
\begin{document}
\nocite{*}
\end{document}