Hey guys, I would like to install a wheel that I can put down form the tongue of my trailer to help guide it into my extremely narrow opening of a garage. I have seen these before. My questions are: 1.)What are these called. 2.)How much do they cost? 3.)Is this something I can install? I know I can install it more than likely, thanks for any help on this. I have 92 inches of space to fit 91 to 92 inches of trailer into! Normally fitting something so large into a tight hole should be fun, right?