Featherlite owner here, I recommend full length L Track (airline track) for options as far as loading various length cars. Don't get a trailer with a standard hitch length, these make it nearly impossible to turn sharply and you will need to, believe me, at the least opportune time/place. A trailer winch is great for loading/ unloading but aren't totally necessary. Interior lighting for your trailer is great for checking on your load at night or unloading. At a minimum get the highest rated axles you can and don't get a trailer that comes with glorified car tires (light weight 15's with a mediocre load rating. For tie downs, check out MAC's, they are the best quality and stand behind their products. I've used their products for over 12 years.
https://www.macscustomtiedowns.com/?gclid=EAIaIQobChMI2_bjgbey9gIVpB-tBh1tNQZSEAAYASAAEgKxdvD_BwE
https://www.macscustomtiedowns.com/?gclid=EAIaIQobChMI2_bjgbey9gIVpB-tBh1tNQZSEAAYASAAEgKxdvD_BwE