Low price high ROI coins are usually difficult to find and come with some risks. If a high ROI coin is at a low price it indicates people may be dumping the coin as soon as the rewards are paid to get their initial seed capital out and what tends to happen is these coins continue to drop. Have a read of my next article as this gives pointers on what to look out for. You really need to be aiming for a mid tier ROI coin that has been running a while with a decent team — a lot of masternode coins are at all time lows at present but picking a decent project is key to ensure your investment does not bottom out and never recover.
Hope this helps.