Now all the mining communities are waiting for the start date of ethereum 2.0, so I do not advise you to start mining on the GPU.
PoS is going to be released in Q4 or later. That is plenty of time to make profit with a mining rig even if it declines in value. Keep in mind that PoS seemed imminent back in 2017 as the Difficulty Bomb exploded and blocks were getting frozen. That was a worse situation than right now.
How much money will you get for 5 months of maning? You may be able to get 30% of the cost of the video card back if the price of Ethereum doesn't drop too much, but I don't see any profit here.
Do you have information about the 4th quarter?