I don't own a Swift, but I do own a trailer, so here are three general comments:
1) The major maintenance with the greatest financial consequences are leaks. The maintenance is checking and repairing problems in roof seams, devices, window seals, hatch seals, any place something has made a hole in a sidewall or roof. Since your trailer is aluminum sided (I think) repairs are less expensive than with hard sided sandwich construction.
2) Your trailer is a vehicle; brakes, lights, frame, tires, wheels and suspension must all be kept in good working order.
3) Use and enjoy your trailer; you will get it all figured out.
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch