Provided you are not wildly overbuilding your trailer or towing with the Electric Jeep Wrangler you should be able to tow a 4 or 5 foot trailer. Also avoid installing grand pianos, anvils, ships anchors and all should be fine.
I have a 5 x 10 Superleggerastyle trailer. Fabulously designed by our very own Angib. Thanks man! :D
I tow with a 2 litre diesel, Toyota Avensis (Station-wagon) with a tiny 115PS(85kW) engine. The car is usually packed to the roof with camping crap including a boat and an outboard engine. It's hard to tell at times that there is actually a trailer on the back from the negligible change in handling.