Small Car Towbar

Hi all,

Whats the deal with towbars on small cars? Can it be done easily aftermarket and on second-hand cars?

If so, does anyone have any experience with the pricing?

And how much can you reasonably tow with a Corolla/i30/Mazda 3 sized car? Not expecting to tow a caravan or anything, but just a basic box trailer with some retaining walls blocks for example

I am looking to replace my car with something from 2014-2016 era and would like to upgrade to have the ability to tow a trailer. I have had many times where it would have been useful to be able to throw a few things in a trailer (sofa, washing machine, mattress)

I obviously could just bite the bullet and buying a Commodore or similar but I do prefer driving smaller cars around town