How much dog hair is ok?

[Inna22]

For those of you who host pets- how much hair is acceptable, particularly if you do not charge a pet fee?

I feel like if you charge a fee, it goes to hair clean up among other things.

However, if there is no fee, where do I draw the line? Is any amount ok because it goes with the territory of hosting pets or is the guest responsible for cleaning furniture surfaces if they have a shedder who they allowed on furniture and washing blankets if dogs are allowed in multiple beds and are shedders?

I want to write away pre empt comments about having dog rules. I have plenty of rules already and people aways think their pets are better trained than they are (including me :)). I am also not going to have a fee for multiple reason and happy to discuss them but my question to you'll is for the scenario above. 

The exuberant amount of hair comes up rare enough that I do not want to change how I do things, just curious at which point an extra clean up fee is warranted.