What about a Keystone Bullet Colt 17Ft Travel Trailers?

I wouldn't. If you do your research there's an ongoing issues with the floors in the 2018/2019 Bullet models. Essentially the laminate construction has proven to be an issue with a large # going back to Keystone or not fixed (in the case of ours) with Keystone bailing on a lot of warranty. They've been redesigned for 2020, but 18 and 19 are problem years.