The weight is well within range, not sure how tall the trailer is but the enclosure will create quite a bit of wind resistance, so at highway speeds you'll definitely be feeling it between the weight and wind. Make sure the trailer brakes are working well. Also, you can affect tongue weight quite a bit by how far forward you load the car on the trailer, you want at least 400 lbs. of tongue weight, a bit more might pull better.
Hope this helps! Not sure about mirrors.
Hope this helps! Not sure about mirrors.