RV Repair: gutters, aluminum siding, rubber roof

Question
We have a houseboat but it is basically like a camper. It has a rubber roof And aluminum siding all around the boat.  We would like to put gutters on the boat but really don't want to make holes in the roof or siding. But we may have to.  What would you suggest to be the best way to put gutters on?   Thank you for your time

Answer
You can buy putty-tape from a camper store.  You put that on first, then buy these hangers from HOme Depot in the gutter area.  They screw in and then clip the gutter to the wall.  That is how all my house gutters are hung.  Better than gutter nails and the putty-tape will seal any leaks.  

Good Luck.