Good comment and questions. Micro-guides reduce the weight at the end of the rod. That means the rod feels lighter and more natural. A spiral wrap for casting rods changes the stress on the rod and enables fewer wraps, again reducing stress and increasing the natural feel of the blank. I use Recoil titanium guides. They do not break and they do not wear out. Their only negative is that braid sings as you retrieve.
Think of it this way. Medieval swords had a big honking knob at the butt to make the blade feel lighter. Made correctly, you can throw a Ned on a baitcaster. Made correctly you can troll a wiggle wart at 26 feet and feel the bite. Made correctly, you can match a G. Loomis for about 66 to 75% of the cost.
I am hesitant about tying fly rods. I have never done that. Casting or spinning rods - I can make what you want at the top end performance for less than $200 +/-.
BTW, what reel you will buy or intend to use is part of the equation. When you try out a rod at Bass Pro, the reel they have on the rod makes a difference. The same is true for custom rods.
Someday soon, you will decide whether to go in that direction. Or not. If you decide to try, message me or post for the experts here to comment. I have found OA to be one of the few places worth visiting to learn.