Re: Building a workshop/big garage by myself.. need to know how 
I suggest that you double check your zoning regulations. As an example, I live in a small subdivision that sits outside of town. Everyone has 1-2 acres. There are no subdivision rules as far as what type of house, outbuildings, etc (except no mobile homes or modulars). I can build a shed, stick-built garage, etc with only a permit application. BUT, if I want to build a pole-barn, then I have to have a public hearing, pay additional fees, etc. All because I don't have 5 acres.
This may not apply to where you live, but it would be wise to find out before you start ordering materials. I would think that a pole-barn would be the cheapest to get you going. I have seen many pole-barns that have been converted into finished offices, etc. Traditional framed buildings is easier to finish, but more expensive in the beginning.
I suggest that you double check your zoning regulations. As an example, I live in a small subdivision that sits outside of town. Everyone has 1-2 acres. There are no subdivision rules as far as what type of house, outbuildings, etc (except no mobile homes or modulars). I can build a shed, stick-built garage, etc with only a permit application. BUT, if I want to build a pole-barn, then I have to have a public hearing, pay additional fees, etc. All because I don't have 5 acres.
This may not apply to where you live, but it would be wise to find out before you start ordering materials. I would think that a pole-barn would be the cheapest to get you going. I have seen many pole-barns that have been converted into finished offices, etc. Traditional framed buildings is easier to finish, but more expensive in the beginning.