Personally I feel if you want to do it then just do it.
People should be able to separate fact from fiction. I like the whole gypsy aesthetic type thing but I’m well aware that doesn’t reflect actual Roma people.
You’re not intending to offend or insult anybody, but it’s not your job to educate people on cultures either. I’ve seen people jump through hoops to portray a culture accurately and people still get offended.
When it comes to culture, research helps but you’re never gonna fully understand it just due to not being immersed in it. Therefore, you’re going to offend some people anyway.
I say play with the stereotype, use it, but make it more meaningful. Like have an eccentric gypsy type character, but have them be more than that - give them a personality. It doesn’t even have to be the opposite personality associated with the stereotype, the goal is to make them feel human and relatable.
That’s always the main issue with stereotypes I’ve seen - they’re often just stereotypes and nothing else. All sorts of types of people exist in the world, so I say show that - I’m sure someone somewhere is Roma and actually enjoys the gypsy stereotype aesthetically.
But eh, I got off topic - my bad. The wagon is cute and cool, I say use it. Show the beauty of it in your comic if you enjoy them so much. I’m fairly certain other types of people use wagons anyway.