CONCRETE: 3000 PSI, 4" thick. Reinforced w/ steel bar, mesh will be the specification for such.
The costy is unknown, but you could look this site and call them for the information.
http://interstatelift.com/interstate...m_one_sing.htm
Can also be found at Northern Tools for around $3700.00
http://www2.northerntool.com/product-1/200102624.htm
Dex....