You look at the house, look left around neighborhood, look right, and just tour at a normal human speed looking around exactly as any person coming to tour would. 

I FOUND THIS DEAL THROUGH WORD OF MOUTH I WAS TELLING DIFFERENT PEOPLE IN MY CIRCLE I WAS READY TO BUY AND LONG BEHOLD A BUDDY OF MINES WHO IS A REALTOR PRESENTED ME THE DEAL AND LET ME MEET THE OWNER WE HAD A GREAT CONVERSATION AS HE TOURED THE PROPERTY WITH ME HE EXPLAINED HE HAD HIGHER OFFERS BUT BECAUSE HE SEE IM A YOUNG GUY DOING THE RIGHT THING HE REALLY WANTED TO SELL IT TO ME AND THE REST IS HISTORY !

It's very expensive for Europeans to visit the US. 

I recently toured a property in Phoenix where solar power and water-saving features cut operational costs by nearly 20%.6.

Research shows that the more experienced home buyers have a longer and generally more specific list of demands than first-time home buyers.If our buyer does not have a home tour checklist, I give them a version that I have used for years (I did not create it, another investor shared it with me and I have used it). 

It took 6 months of market research (you won't reinvent the wheel), 2 months to build spreadsheets (analysis paralyze), 6-7 house tours (leverage a local RE agent), and 30 days to close with a conventional loan. 

Once they on board more European hosts, I will get more use out of it.

I'd suggest scheduling a tour with each company and deciding which one fits you best.

In MN, where it's really normal for a tenant to tour 10, 20, 30 units before selecting one and getting it, yikes $500. 

Narrow the list down then, last step is make the time and go tour them.