Secondly, is it still viable to start a mining business now days?
Personally I would stay away from the mini miners as there is basically no profit unless you have really cheap power.
Secondly, mining… I think starting now is still a good option but you have to be prepared to wait to see profit. There are a lot of people that want to get rich quick and unfortunately it doesn’t work that way. Miners are cheap to buy if you can wait on profit.
Just my 2 cents