Welcome to the forum.
There are several members here very experienced with AC circuits and RVs and they should be able to provide some good information.
Until you hear from them, there are a couple of questions they will probably ask you:
Where will you getting power for your trailer? (RV park, next to a house, etc.)
If you will be in cold weather for days & nights at a time, do you have plans to keep your tanks (fresh, gray, black) from freezing, too?
Will part of your heating be done with propane or do you plan to use only electric heat?
Good luck with your project.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.