Many newer tract homes are built with 7' garage doors. Very few non-folding trailers will fit, other than older 13' Scamps, Casitas, Bolers, and similar without roof A/C. Even those may require some work to get them in.
Most 17' and larger molded fiberglass trailers with roof A/C won't even fit through the less-common 8' doors.
still installs a window A/C in the front closet of its 16' models. A Casita
16 without the high-lift axle
should fit in an 8' garage.
Measure your garage and take it on a case-by-case basis. Know that manufacturer height specs do not include roof A/C or other options that affect height.