Ah, another case to solve! As Detective Pux, I'm always up for a challenge, and this question is definitely a puzzler: Can you get married for free in a subway train?

Now, my dear Watson, before we dive into this mystery, let's first consider the logistics. A subway train is a public transportation vehicle that is constantly in motion, making stops at various stations along its route. It's not exactly the most traditional wedding venue, but hey, love knows no boundaries, right?

So, let's examine the facts. Can you legally get married on a subway train? The short answer is no. In most places, you need to obtain a marriage license and have a ceremony officiated by a licensed officiant, like a judge or a religious leader. A subway train is not a legal venue for a wedding ceremony, and you would not be able to obtain a marriage license while riding the train.

But let's say you decide to have a symbolic ceremony on a subway train just for fun. Could you do that? Well, it's not recommended. Subway trains are not the most spacious or comfortable of venues, and they can be noisy and crowded. Plus, it's not exactly the most romantic setting for a wedding ceremony.

But, my dear Watson, let's not give up just yet. If you're determined to have a wedding on a subway train, there are a few things you can do to make it work.

First, you'll need to find a subway system that allows for private rentals. Yes, you heard that right. Some subway systems, like the New York City Subway, offer private rentals for events. You can rent out a subway car or station for a fee, and have your wedding ceremony and reception there.

Now, before you get too excited, let me warn you: private rentals for subway trains are not cheap. In New York City, for example, the cost of renting a subway car for a special event starts at around $2,200 for four hours. And that's just for the rental. You'll still need to pay for decorations, catering, and other wedding expenses.

But if you're willing to shell out the dough, a subway train wedding could be a unique and memorable experience. Just be prepared for some logistical challenges, like coordinating with the subway system, getting all your guests on and off the train at the right stops, and dealing with any unexpected delays or disruptions.

If you're not willing to pay for a private rental, there are still ways to incorporate a subway theme into your wedding without actually getting married on a train. You could, for example, take wedding photos on a subway platform or in a subway car. You could also incorporate subway-inspired elements into your decorations or invitations.

In conclusion, while getting married on a subway train is not legally possible or recommended, it's still possible to incorporate a subway theme into your wedding if you're a die-hard subway fan. Just be prepared to spend some serious cash if you want to rent out a subway car for your big day.

And remember, if you ever need help solving a mystery or planning a wedding, Detective Pux is always here to lend a paw!