Flipping houses is a great way to create huge profits, raise private money and create marketing content around your remodels (the reason HGTV is HGTV).

More importantly why don’t you send money to TripAdvisor, Fairbnb, or booking.com?  

If you are 100% occupied (and trending) no need to spend money.

You will need money to put down on the property.  

I've used the search feature on this forum but didn't have much luck.Are there any US investors, hard money lenders, or groups that invest in flips outside of the United States, specifically in Europe (Netherlands, Spain, etc.)?

I wanted a house for myself to live in and I had been living with parents for two years to save money.

Spending the owner's money, not saying anything, and letting them discover it while reviewing the monthly statement is unprofessional.

This risk is amplified the less money you have attached to the deal.

We have been able to save up some money for our first turnkey multiple unit building.

The expert you are looking for is called a Land Surveyor, they're going to want 5k-15k, if you want to make any money on your project you need to build a house so you also need an architect, they will want 10k-50k, if you're in a hillside zone you will also need a geologist, they're going to want 10k, you will also need a biologist, they're going to want 2k-5k.