Adding suffix in items urls?

Hello

right, but for the case that you describe you could use item's alias

1. so why not use the above ? is an extra setting worth it ?
2. also this should be added to item's type or category thus each item will get it from its main category ?

you could use item's alias

Yes, but we have to edit each item alias. Not usefull.

2. also this should be added to item's type or category thus each item will get it from its main category ?

I thinks it should be setting for Types.

Type Rent - Suffix ="for-rent"
Type Buy - Suffix ="buy-now"

But It can be overrided in category settings.