There are many hot topic here these days whether should one invest on mining NOW. of course nobody can forsee the future and everydoy can only make estimations.
Currently the price of GPUs has really increased and no matter what some say it is not possible to find cheap ones, the only question is how expensive they will be. In most cases, under the current conditions, it would take between 6 -10 months to take your money back, depending on if you plan only to add one gpu, create a new rig from the beginning, the price of gpus you will find etc.
My question to everybody is what is the bordeline "take my money back" period that you would accept for putting your money NOW in mining. Is it up to 8 months, 9 , 5 or what ?
I have no idea about the correct action but I would "guesstimate" something like 6 months.
It is quite tricky indeed to determine the ROI.
The factors considered here are 1. cost of electricity 2. current price of the coin your mining
what you can say for sure is that if at day one you calculate the ROI and its say around 10-12 months depending on the investment cost, the time goes on reducing and the price of coin goes on increasing. Your electricity cost will remain same more or less.
It is possible to get reasonable priced gpus which are used by gamers.. maybe not in bulk.. but what i am doing is acquiring 1-2 as and when someone is selling.
I recently got 3 RX 480 for approx $1000.
then their is a whole thing of speculative mining... i recently herd people made rigs with 6 gpus and ROI'd in a month already.
But this needs time. like full time of you, to look at markets, switch miners and sell at the right time. Less automated rather.