Although you are very graciously courteous, from your posted pictures it appears the environment the DMM will work in is not likely trivial, and separately, nor are you unfamiliar with potential pitfalls in built-to-a-price "test" equipment. The only answers I need when I buy test equipment are:
1. are you safe using this equipment in case of an unexpected fault, and
2. can you trust, rely on, or in some cases, publish the readings it gives
Buyers always want to pay less. Many profit-minded "businesses" seize on this to offer products at incredible "value" that are inadequately engineered and tested, or passed rigorous safety and reliability tests. Good components cost more money but they pale in comparison to the cost of thorough, competent and truthful assurance testing - components are generally getting better at the same price but the cost of competent engineers and thorough engineering is always increasing. The pages of this forum are full of doubts of brand x or y and attempts to do what "built-to-a-price" manufacturers should have done on their own.
I am now only the higher-end models from Gossen and Fluke as they best meet the 2 criteria mentioned above - they are likely safer to use, and I can trust the results they provide. Of course I have been tempted with lower-cost options and did yield to their allure a few times. But now, after eventually spending more in the end almost every time, my motto is "Buy once, cry once".
Like I said initially, I have not used a DMM for around 20 years, also I am really poor at explaining as I have a medical condition which actually "communication difficulties" are part of it. It's basically something about neurons getting stuck or going down the wrong pathways etc....
So I'm trying to do the best I can here. If it was computer network equipment from brands like Cisco then I would have a much better idea because I have been dealing with that stuff for many years both personally and professionally.
An example would be my wifi setup which uses a Cisco WLC 4402 controller, it is old... too old and EOL'd. Would I recommend it? No way, unless it is a corporate business their model is too restrictive ie. no software updates unless you have a service account and they stop support for older models quickly
In order to save some cash I bought mine used at a crazy low price and now I am suffering. Sure I don't wana spend $10k on a newer version but something like Rukus is much better supported and end user friendly due to their business model.
The controller still supports LDAP and RADIUS authentication with LEAP or PEAP etc... so absolutely no problems.
This is primarily why I didn't include a price, because at the end of the day I don't know how much would need to spent on a decent meter. The suggestions of many people have helped to assure me that you don't need to go beyond $500 or even a $1000 for decent meter.
You also mention the 'safety' aspect and I am all well too aware of it which is why having something like CATIII or CATIV certification is relevant. On the other hand, like a few people have pointed out the Flukes and Gossens have a paper trail which helps businesses that deal with these things professionally.
The above is not my use case as mostly I deal with Ethernet cable installation if at all. I have 2 Greenlee cable testers for this, one a mini tester and the other a distributed tester. I find them to be fantastic but do not use them everyday.
As for my images, I'm trying to help explain things of what I need the meters for where otherwise I am failing to explain in text. At the beginning I already recognized the issue as @Martin72 mentioned that I am not wording things very well to get to the point.
The last thing I want to do is cause frustrating for you guys or upset anyone. I am all too well aware of my personal issues and shortcomings which is why I am so grateful and thankful for so much input from everyone.
I can assure you that starting this thread was probably more difficult for me then anyone trying to chime in and help through the really vague descriptions that I have given.
Honestly, I really apologize if I am causing frustration among everyone!
