Please add the option for guests to tick a box when they want extra amenities (for example we have free street parking but can also rent a parking spot inside the private courtyard, but we have to pay for it and often the guests do not read the description to see this part and then we are put in a really awkward situation when we have to explain that they need to pay more for something they thought was free, and bringing a pet is the other example).
If when they book there is an option to tick a box to pay for the "extras" it would make things easier for everyone because the guests will understand what they can expect and we don't have to have an awkward situation where we feel as if we tricked them in some way.