Honestly right now there are not many coins that can be mined on computer and are also profitable at the same time. Its better to buy such cheap coins from exchanges then to mine them. If you are mining enthusiastic then you can learn alot from mining the MASS but its not a profitable thing.
Same was said for MASS even when it was not on any exchange. You need to find how much HDD is sufficient to mine MASS profitably. If you have sufficient storage space that can give you profit then you can go for it. Otherwise just buy it from exchnage.
Right now buying this coin from exchange is better option then to mine it. See the price it has drastically gone down and there is no better time to buy it then to buy it now but for long term. There is little chance that it may go up in short term but definalty a good one for long term.