I've basically done everything short of laying concrete foundations and putting up the frame. Not all on one house, but bits various houses.
There are a lot of things you can do yourself (depending on jurisdiction) that can save a lot of money. My old man owns several houses, and home renovation/building houses is sort of his hobby (it also makes him a lot of money, but it's not his day job). I've been helping him with renovation/construction since I was about 5 years old.
My father and I have built our own fences, painted interior and exterior, plastered (not actually so easy), tiled floors (also not that easy), laid wooden floor, laid decks, built swimming pools (we did hire a contractor to dig the pit), retaining walls (took a weekend, saved about $10,000), internal electrical wiring and fittings (you may need to get a certificate to do this), ethernet/phone wiring, installed roof insulation, built kitchens, laid driveways etc. etc.
The only things I haven't done are laying concrete foundations and erecting frames (all the houses I've worked on were timber framed).
The main problems you're likely to run into is whether you're legally allowed to do it yourself or not. You'll most likely need qualifications to do any electrical work (which my father has, although he's not an electrician) or plumbing/gasfitting work.
My suggestion though would be to start small. I've been doing this sort of thing since as long as I can remember, so I'm fairly confident in what I'm doing. If I were you I wouldn't start with trying to build a house from scratch, start with building some smaller things, like rebuilding your fence (if you have one) or building a shed/sleepout.
I really don't know how feasible it would be to make a concrete house by yourself. I wouldn't lay a concrete foundation myself, it's not a one man job to start with, and if you screw it up it's a very expensive mistake.
If this is your first experience with building a new house, which I assume it is, I'd really caution against trying to do it all yourself and biting off more than you can chew. Get an architect, get a project plan (I have no experience at all at this end), and then break down what you can do yourself, and what you need to pay somebody else to do.
There are a lot of things you can do yourself (depending on jurisdiction) that can save a lot of money. My old man owns several houses, and home renovation/building houses is sort of his hobby (it also makes him a lot of money, but it's not his day job). I've been helping him with renovation/construction since I was about 5 years old.
My father and I have built our own fences, painted interior and exterior, plastered (not actually so easy), tiled floors (also not that easy), laid wooden floor, laid decks, built swimming pools (we did hire a contractor to dig the pit), retaining walls (took a weekend, saved about $10,000), internal electrical wiring and fittings (you may need to get a certificate to do this), ethernet/phone wiring, installed roof insulation, built kitchens, laid driveways etc. etc.
The only things I haven't done are laying concrete foundations and erecting frames (all the houses I've worked on were timber framed).
The main problems you're likely to run into is whether you're legally allowed to do it yourself or not. You'll most likely need qualifications to do any electrical work (which my father has, although he's not an electrician) or plumbing/gasfitting work.
My suggestion though would be to start small. I've been doing this sort of thing since as long as I can remember, so I'm fairly confident in what I'm doing. If I were you I wouldn't start with trying to build a house from scratch, start with building some smaller things, like rebuilding your fence (if you have one) or building a shed/sleepout.
I really don't know how feasible it would be to make a concrete house by yourself. I wouldn't lay a concrete foundation myself, it's not a one man job to start with, and if you screw it up it's a very expensive mistake.
If this is your first experience with building a new house, which I assume it is, I'd really caution against trying to do it all yourself and biting off more than you can chew. Get an architect, get a project plan (I have no experience at all at this end), and then break down what you can do yourself, and what you need to pay somebody else to do.