Joiner as auto-entrepreneur?

I am a social researcher who has set up this year as an auto-entrepreneur (prof lib). My husband is a time-served Joiner, although has taken time out from paid work since we’ve been in France as he’s been renovating our house. The longer-term plan has always been for him to set up as a Joiner here and word has been getting around about his background, so people have started asking him to do joinery work. We’re assuming auto-entrepreneur looks good for him? He just wants to work on his own and can work from home, as we have a barn with all his joinery machines already set up, since these have been needed to do up our own house. We got planning permission to convert the barn to a workshop for our use, does anyone know if doing auto-entrepreneur status affects that?

As we are doing 2 very different types of work, I’m assuming 2 auto-entrepreneurs on one premises won’t be a problem in our case. But as I’m registered as a prof lib, I’m not sure about anything different/ extra artisans need to do to register. I saw an earlier news post about the possibility of rules tightening up to be in line with artisans on other regimes ie needing proof of experience (would a letter from a former employer count?) and registration with the Chambre de Métiers. Does anyone know whether this is now officially required? Is there a list of what a prospective artisan auto-entrepreneur has to do?