All you can do is explain your position from an informed standpoint, hope you can convince them of the non-danger and that you're responsible enough and hope for the best, but if it's their house it's their rules at the end of the day

That's why I have only now received my first snake... and I'm 30 lol

My husband was easier to convince with some time... with him I just didn't stop talking about it for several months He didn't have a fear of them or anything, it was more from a cost/upkeep standpoint but... all is good. Aside from the initial investment and the delicate process of getting the set up done, the maintenance/mess is less than when we had our cats. Or at least more contained rather than all over the house