It will take you a year to get your return of investment if you choose asic miner instead, GPU mining profits is not that good anymore and checking websites like whattomine shows that asic is the best
If exchange rate fall then the asic will be useless. You can sell GPU to gamers, but price will be low, but more that nothing.
Anyway I stopped mining in 2018. Two of my GPU were burned.
I think, it's better to buy/sell BTC or etc than use mining.