A fair way to compensate your financial partner typically depends on the agreement you structure.

Unless the contractor is a friend of yours, they aren't going to go to a house you aren't buying just to tell you how much something costs and if they did, it may not translate to the next home.

If you can sub-meter the water that is always preferred it just depends on how feasible it is to do that. 

HEy, I am living in Poland now, this permit should not be too difficult to get depending on what type of investment! 

very house dependant

If it is working with subs, a GC license won't help that in any practical way.At the end of the day, it depends on what you are looking to achieve.  

There are some DSCR lenders that allow this structure, it just depends on what your goals are.  

Many though, struggle to understand our market and the US culture of tenants.At the first negative issue, many panic and either want to sell or terminate us:(It can be done, but depends on your team and YOUR management of the manager.

Although it also depends on your projected usage and average length of stay.

It totally depends upon the size of the STR.