from my point of view, solo mining is no profitable anymore, is only profitable if you have cheap electricity, but you can always join in a pool, maybe thats the best chooise for you.
btw you can always rent some hw and use it, sometimes is a good idea
cheap electricty wont help you solo mining, you need a pretty good damn equipments if you want to go with that route, we are now around 300p peta right?
without considering the diff, one should look at around 1 block per month at least, to begin with solo mining, this mean that at current diff you need around 80 tera or 70 antminers s5
70 antminers s5 are 70, cost 25k