Bitcoin mining machine suggestions

Thinking about getting a mining rig. Any suggestions? Also, how long do you think it takes for a top-notch mining machine to mine one Bitcoin?

Maybe you know all this, but since you're newbie and your question looks more like jumping in head-first, I feel have to write all this: Mining bitcoin is pretty much a business. Mining machines are far from cheap and if your electricity price is not overly cheap you'll end up mining bitcoin more expensive than buying it. So I advise you read more and understand better what you're planning to do. Also, if you will have only one miner, you will probably use pool mining, gathering tiny amounts from each block mined by that pool, you won't exactly "mine one bitcoin" directly. Actual miners would give you more info about machine and approximate time frame for getting 1 BTC (assuming the difficulty doesn't change much)

Let's take the Antminer S19 XP (140Th) as en example: We'll disregard price fluctuation or electrical price, because you asked how long would it take to mine 1 full BTC So the remaining variables are difficulty adjustments & halvings (in ~2 years the reward will decrease to 3.125 per block) If today you would start pool mining, a 101% guesstimation would be ~10 years if you're lucky (there is no exact math formula for this) P.S - My guesstimation can have some errors of +/- 99%, but mostly + - This is not the way you analyze if mining would work for you ! Electrical price and eventual BTC fluctuations need to be taken into account and many other aspects !

Check Canaan units it seems they are selling cheaper right now compared to Bitmain. And also if you are a newbie at least read this sticky thread here "First time/Small miner reference for getting started" Depending on so many things if you talking about the whole Bitcoin you won't be able to mine 1 BTC with a single miner you need 8PH/s to be able to mine 1 BTC every month.

if you go to viabtc.com they tell you what 1th  of mining gear earns daily. a hi end btc miner mines at 100th so the rate today is 0.00000433 btc for 1 btc or 0.00043300 btc for a 100th machine daily. please note this is subject to change mostly is gets smaller every 2 weeks. so your 100th gets 0.00043300 btc in a day which would be 0.00433000 btc in ten days if the daily rate stays steady. and you 100 th miner gets 0.04330000 in 100 days after one hundred days passed that rate of 0.00043300 for your 100 th machine would likely have dropped to who knows maybe 0.00040400 a day so hundred days 0.04330000 2 hundred days 0.08070000 3 hundred days 0.12000000 days so a state of the art 100 th miner will do close to 0.120 btc in 300 days mere guess that .120 btc is correct. so for that 1 btc in 1 year you need maybe 8 machines doing 900 th each. merely an estimate guess etc but ball park.

Is pretty close to ... ... with 1 machine Glad to see my guesstimation was not that off after all

Yep you are close but going out 10 years is a lot. in 2012 I mined btc with gpus (pre asics) around 40 pieces of them If I overclock and maxed out all of them I had 22gh out of 22th or 1/1000 of the entire network in my garage I mined 7 coins a day   used about 264 kwatts for that whole day. today I would need 1,610,000 th or 1610 ph or 1.610 eh to mine 7 coins in a day this is  about 16,000 s19's spend 1125 megawatts to mine the 7 coins. If  all gear were 29 watt a th  s19's quite a bit of gear growth. Plus power use. 264 kwatts = 7 coins about $2.64 in power 1,125,000 kwatts = 7 coins  about $112,000 in power there are natural limits to just how much power can be tossed at mining. Ie going from 264 to 1,125,000 can be done in fact it was done. going from 1,125,000 Kwatts to 4,794,000,000 Kwatts  is not likely. but Solar has huge growth commercial Panels now are 21% effective  the best of the best are 37%.  Perfection may be a 48-51% possiblity. Translation a 400 watt panel may get as good as 800 watts in the future. So 2x is easy peasy. How much space for panels. Tons every parking lot in the world from 45 lat south to 45 lat north could have panels. https://www.nj.com/news/2019/06/six-flags-is-now-one-of-worlds-1st-solar-powered-theme-parks-more-clean-energy-is-on-the-way.html Every time some one talks about BTC using power just show them this image and tell them instead of governments letting this happen below

You can find references here https://www.asicminervalue.com/, and there are calculations like my comment above. my advice, buy a machine that is up to date, if you make a profit, set aside a little to buy a new version of the machine.