Trust me man, unless you are hell bent on designing your own home, its going to be way way more money than just going by one of the builders premade templates, and letting the builder build a house.
I’d even go as far as only buying a prebuilt house. This way you don’t surprise yourself by ordering upgrade after upgrade that you really don’t need.
I’m looking at buying a new house in phoenix, and its amazing the difference between buying one thats prebuilt, or having one built to your specs.
Plus if there is a girlfriend involved or whatever, FOR SURE they will bitch and bitch until they get certain upgrades.
When you buy a prebuilt house, you avoid all of this.