Nissan Altima: in addition to the basic limit supplied by Mary, every vehicle has a few more limiting conditions, all of which need to be met. I always suggest reading the manual... you might be surprised how much information is in there. I looked at the
2007 Altima Owners Manual, and there's an extensive and very through section specific to trailer towing, plus other references to towing (e.g. don't tow when using the space-saver spare) scattered though the manual. There is a also a
Towing Guide offered on Nissan's
Manual & Guides web page.
As Mary mentioned, the classic 13' eggs (Boler,
Scamp, Trillium) will be over 1000 lb when loaded; most are well over 1000 lb even empty... but there are smaller designs.
Most travel trailers with a maximum rated
weight under 2000 lb do not have
electric brakes; however,
brakes are required for any travel trailer with smaller tow vehicles (by the tow vehicle manufacturer), and are certainly advisable. They can be added.
By "swerve preventer", you probably mean some sort of "
sway control" I suggest searching (use the
Search engine) for this phrase for many extensive discussions - there is no simple answer.
The portion of the
electrical connection of the car to the trailer for the
lights is usually easy (you buy a plug-in "T-connector"), but the brake controller will take custom wiring. It's not particularly difficult, for someone accustomed to custom automotive wiring.
A modern
trailer hitch installation is just a bolt-on exercise, and can be done by almost anyone. Sometimes some body parts (such as part of the bumper cover) need to be temporarily removed, adding some hassle and effort. Usually these are do-it-yourself installations, or done by the hitch shop which sells the hitch. Around here, hitch prices are normally quoted including installation.