@Mary450, welcome to hosting! Lovely place you got - and so smart of you to turn off IB ( at least at the beginning) and to trust your gut feeling about the inquiry from this boy. I bet you did the right thing declining him, local requests often bring problems, as you will find out when you dive deeper into the community here.
On an unrelated note, I would like to run this by you: I see you charge $72.00 per night for a max of 4 people - that seems very reasonable to me and definitely on the budget conscious side. AND you promise a breakfast!! O wow, what a deal! So, are you prepared for 4 people to spend 3 nights there and cook 12 breakfasts for them? I would really, really rethink that. The idea here in the forums is: underpromise, overdeliver and you'll get great reviews.
Your guests have a kitchen, right? can you perhaps highlight that with one or two pictures? And how about you put a few nice welcome treats there, have coffee grinds, tea, some fruit, some muffins, etc. That is definitely enough - and you will not get worn out! At the beginning of my hosting, I offered breakfast ( 4 choices) for a marginal fee, but to my great surprise nobody took me up on it. After a while it got old to have all ingredients ready just in case someone orders breakfast. So I scratched it, but put goodies in their refridge - and everybody is super happy! I have less work - and they have plenty of stuff to get going. That seems the optimal solution, at least in my case.
Good luck and happy hosting to you!