I have an L3+ at 11.8c per Kw/h. It costs $2.26 per day.
One thing to consider is that you'll likely need to buy crypto get a miner from Bitmain. I spent 3.04 BTC for a couple S9s last February and March. I've made about 2.4BTC back, gross. By the time you pay for electricity and build a space - these are industrial - it may be best to buy and hold.
I mine because I like the tech, wanted daily cash flow, can sell the miners and am working it into a larger plan to start a business. The longer I am in this, the more I realize I'll need to do more than mine crypto if I want to get beyond even in terms of the crypto I use.
On the plus side, there is really no better way to understand the tech behind crypto by mining it - in my opinion. You can switch to mining different coins and rent out your hashpower on Nicehash. ASICs are much more profitable than GPUs (ROI), but there is more involved than I first anticipated. However, it's pushed me into being "all in" and expanding my horizons on how to be involved in the ecosystem.
There is no right or wrong. It's a jump. But it's best to have 220v power, ventilation and somewhere they can be noisy without bothering you. Another consideration is that difficulty rises, so you get less-and-less crypto over time (0.33LTC per day, 0.28LTC per day, 0.24LTC per day, ...). If you're going to go in on mining, you may want to consider a business aspect. Block Operations has one of the best YouTube channels on that aspect. It's worth clicking that link.
EDIT: Don't forget you'll need a power supply