The Brew on Premise defense only will go as far as the personal consumption of the people that made it.
The only difference is that someone else is providing the space and equipment.
When the beer goes out to a catering company, a legit business that is providing a service for money to a couple and hundreds of guests, that is not personal consumption, that is a business. The article even goes as far as saying the only thing you can do as far as that beer being made is clean the equipment. You cannot mix, boil, rack, or do anything else that will turn grain into beer.
When I was in VA, there was a winery business there that had a model similar for winemaking. They could afford lawyers. They had space, they had primary and secondary fermenters, corkers, wine making kits, and knowledge. Their model was mostly aimed at a couple coming in wanting a wine to commemorate a wedding or anniversary. The couple would pick out the type/flavor/kit/bottles/labels. The couple would mix everything, pitch the yeast, come back in a week to rack to secondary, come back in a couple months to bottle and label. Then the couple would take the wine home. After that whoever the couple would GIVE the wine to is their business. I think they would expressly PROHIBIT working with any catering company. I was working by this place one summer and talked to them regularly and tasted a lot of wine. They occupied business space in a strip mall. I think they got visited about every other month no notice by the BATF for compliance for that side model. I just looked them up, and the "brew your own" model seems to be gone, but the winery part is still there. It would be your risk, your mortgage, not hers. It may be possible, but I would seek out your ATF rep, get copies of docs and take names.