This is all good advice especially for someone considering upgrading their bandwidth. People start looking at bandwidth packages and think this is going to solve their speed and connection problems. When in actuality, their performance may be due to their connectivity and interference of their home wifi network.
Be real, I don't care how many children you have on your home connection, 100Mb is a massive pipe. Most businesses don't run on one quarter that pipe. So before you up your pipe from 25 to 50 to 100Mb, put some money in a better Access Point or Mesh system as suggested. It will be better money spent.
We have 60Mb at home and stream to a number of devices without issue. At the lake, we have no TV, so everything is streamed over a 50Mb pipe. Two families, 4 kids and upwards of 15 devices connected. We also extend it to our neighbors without issue.
I have our Access point setup with a 5Ghz SSID and a 2.4Ghz SSID. 5 gives us higher performance inside the cabin. And 2.4 is slower, but gives us better range out to the end of the dock and to the neighbors cabin.
I also used a WiFi scanner to check what channels overlap with my neighbors at home and was sure to put our equipment on non-overlapping channels. Now my neighbors have better performance as well as their equipment is not fighting for the same WiFi space as my equipment.
So to give some reality, 2.4Ghz can hardly touch the bandwidth of the pipe coming in. So upping to 100Mb makes no sense at all. That and the fact that all the things we are streaming cannot take advantage of it either. These newer WiFi standards can, but check to see if your devices are utilizing them. Many don't. Most everything has both, so it's a non issue really.
So again, listen to the advice above and save the monthly up charge. Put it into infrastructure to increase performance, eliminate drops and you will be happy once again.
Good luck,
PS: those that have whole home wired networks like I do (I swapped all RJ11 phone connectors for RJ45 Ethernet jacks when we bought the home) I put all of our DVR's and Blue Ray players, game consoles, Color LaserJet, 4Tb NAS and kitchen desktop on Gb Ethernet rather than WiFi. It's just less devices fighting for WiFi. And they are much more stable. And rather than extending the WiFi, I setup a wired Access Point on the same SSID so our devices roam from AP to AP on a stable WiFi network.
Sorry, been designing data centers for over 25 years. I turn into a geek once in a while.