think like a cost accountant, and a marketing department
Sometimes cool ideas don't make financial sense. if the trailer has sentimental value, you could keep it as a guest house
#1 Risk factor is low, money wise. You don't stand to lose much
#2 Gain factor is low. You won't get rich.
#3 Consider how much time and effort it will take to clean camper, towels, and bedding.
#4 Figure out how much time and effort goes into advertising, marketing, and booking.
#5 Know that you might need to be ready to change your plans and stay home.
#6 Do you have an awesome scenic location, close to activities?
#7 How much could people that want to stay in a trailer afford to spend?
#8 Insurance costs? Taxes? Commercial property?
#9 Wild tenants? Damage?