2008 4x4 taco AAL ?

I have a 2008 taco and I have some questions about adding a leaf (AAL) to the rear.

I have 5100 bilstien all around. the front is set at 2.5 inches max. I don't mind the Sag look but yesterday while I was hunting I bottomed out the rear. It really bugged me. I also pull a flat trailer and the stock leaf really don't help when taking on a small load.

So now my question is this

1. How much does the leaf cost?
2. How much lift does it give it to the rear?
3. Is the ride terrible.

This is my truck now without leaf

 

We have two leaf options available. The Single AAL set will stiffen up the rear about 10-15% and gives about 1.5" of lift. The 3 Leaf AAL set turns you stock pack into a progressive style pack, so it rides really nice, and also gives 1.5" of lift.