I have a "garden" which has more nettles than anything else. Garden is
a sort of loose phrase, its a bit of a mess.

I want to start a multi year project, where year one is is get rid of
the nettles, year 2 is to do the landscaping and do the grass, and
then year 3 is to think about plants. I don't want my new grass filled
with nettles that I burried during landscaping.

Can I put a weedkiller down that kills nettles & roots ? Right now I
don't care if it kills everything, as long as I can grow stuff next
year I am fine.

Any recomendations ?

I need something thats not too expensive, as I have 1/2 an acre to
do. I can get stuff from a farmers merchant if its the best way.

Thanks
Rick