Is this a part basement and part crawlspace or all crawlspace?
With the first you will need a jackhammer, shovels, a backhoe, and the help of a mexican family with the last name of Labor and they all have the first name, Manuel. A lot of time, hard work, and money but doable. You will be hiring out all the concrete work more than likely.
The second is not a diy job worth doing. Get a house mover to jack up your house and have a contractor do the basement. It will be hard to find a contractor to do this and count on mucho dinero which may be better spent buying a new house with a basement and selling your old one.