I don't think the average consumer will ever have a need for 4 wire POE the average consumer won't be able to afford a switch capable of providing power to all those jacks. There will never be a situation where rj45 jacks replace electrical outlets.
Cate5e is what I ran in the home I just built
Easy to tell someone else what to do with THEIR cash, I have had the HF welder for a few years and it hasn't let me down. If I use a welder 4-5 times a year I don't care how good it is at $500 it isn't worth it.
Direct burial cable in conduit is fine. As a network engineer by trade I tend to stay away from WIFI unless you have commercial grade equipment just my 2 cents. I like the reliability of the cable especially when it's available.
This group buy is based on another post that reviews the unit. Also I bout one last week before finding this post and it works very well Imo. I am not cutting 1/2 steel nor do I have any experience with using plasma cutter. Customers through 14 guage sheet like butter.