The reality is … if you don’t have an army of ASICS miners… you would not be able to mint enough coins to ROI your investment quickly. Plus, you need to manage and pay for power bill which is expensive in Switzerland - one of the highest rate in Europe.
If you have 30K to spend on miners, you are better off buying LTC at the dips. 30,000 / 50$ = 600 LTC more than your 150 LTC target.
If you are adamant of mining anyways, a better strategy would be investing in GPU rigs like Peter’s setup - you can mine and have freedom to mine any coins and GPU algorithms that are profitable.
The ASIC miners on the other hand are designed to only specific algorithms, example: S9/A741s = SHA256 coins, L3+, A4s = Scrypt coins and D3, Baikals = X11 coins.