Welcome! I’ve moved this to project so you can get individualized responses based on your own needs and interests.
It sounds like a very ambitious project! Should be lots of fun in the planning.
The first thing we should mention is that not all of the brands you listed are compatible with each other. The August locks don’t work with smart things, for example. Nor do the haiku fans. Nor does MyQ. There are other brands with similar features which do work with SmartThings, so it just comes down to what you specifically want.
It sounds like a very ambitious project! Should be lots of fun in the planning.
The first thing we should mention is that not all of the brands you listed are compatible with each other. The August locks don’t work with SmartThings, for example. Nor do the haiku fans.
There are a lot of different things to discuss i’m pretty tired today so I’m just going to toss out a couple of things to start with.
You might begin by looking and the quick browse lists in the community – created wiki in the project report section on the list for “whole house” and for “get started”. You’ll find a lot of discussion about some of the issues that you have raised there.
You should also definitely look at the device class features thread (this is a clickable link)
As far as the question of switches to use with smart bulbs, there’s an FAQ for that which should answer pretty much everything:
As far as hub placement, you want to place your hub centrally both horizontally and vertically in order to get the most efficient message transmission. Start with post 11 in the following thread, and then after you read that when you go back and read the entire thread:
Well, that’s more than enough to get started with and I’m sure a lot of other people will chime in as well. Good luck with the project, it sounds very exciting!