With $1500,- what can I buy?
Can you make an example what the profit is?
I'm really new to mining hardware.
Maybe increasing a little bit the budget you can get good hardware, please read this awesome article
http://1stminingrig.com/best-mining-rig-hardware-mine-2017/ Be sure that some stuff isn't available because the mining is getting trending and people are trying to buy everywhere where they see GPUs

The problem you will run into is getting the GPU's. I have been watching a little on 570/580... it's pretty impossible to get the amount I want at decent price currently. Had me looking at Nvidia some... but not sure I want to go that way yet.
*Edit also the motherboard the list works great. But again problem is just getting one at decent price. This at least only 1 per rig and can take a little hit on price. If you pay over retail on 6 GPU's or so it will really add up and hurt ROI.