There's a 50% chance your relationship won't last, so be prepared in case that happens.If you can both work remotely, I recommend moving to a more affordable market.

Ideally, I would love to buy a multi-family property and rent it out, I would consider house hacking but I mainly want to my first property to be one that I can improve on and have it generate income for me.

Why Reviews Are Crucial for Your Airbnb SuccessBuild Trust with Guests: Positive reviews show potential guests that your property is reliable and welcoming, making it more likely they’ll choose your space over others.Boost Visibility on Airbnb: Higher ratings mean your property is more likely to appear in search results, leading to more bookings and greater income potential.Learn and Improve: Reviews often provide actionable feedback.

For example she starts dating a carpenter or a handyman type (or even worse a wannabe carpenter or handyman) who moves in and does work on the home and claims they should have equity too for making those improvements.

That said, the 6.875% rate could be improved.

This type of property has the chance to cashflow, even highly leveraged, in a market where cashflowing properties are quite difficult to find.Could house hacking a property like this work while I am going to school? 

This significantly lowers the cost per door and improves your return on investment.Scalability: A three-story walk-up design allows you to maximize your build cost and land use, just like most professional apartment developers do.Control with New Construction: Starting with a new build ensures fewer risks, as you’ll have control over the property’s condition and avoid surprises from existing structures.Pro Tip: If you do go with an existing property, make sure to thoroughly vet the deal to avoid hidden costs and issues.For first-time investors, multifamily new construction is often the best way to scale quickly, reduce costs per unit, and build a sustainable rental portfolio.

While it's not absolutely indispensable and many have been successful without, you'll maximize your chances of success.On another note, @Sebastian Papworth is right about the fact that many more tourists than usual are visiting Europe this summer.

I fully support doing everything you can as a landlord to be in compliance of local zoning and ordinances, so I want to use your thread as a chance to let newer investors know a really important lesson: you can call the local municipality prior to owning a property. 

Like aircraft checklists and vehicle operators manuals (the -10s), one can benefit from extensive research, trial and error, and deliberate improvement principles gained by the many that have gone the path before.