are you trying to start a "labor pool" or "employee leasing" bus

there are plenty of them already established. As a small business owner if you do not want to be bothered by the paper work, you can run your employee including yourself through one of those agencies. for example:

Bossman Inc. hires contractor Conman Inc. 

Conman Inc hires Worker Bee. 

Conman Inc sends Worker Bee to Bossman Inc to do the work according to contract. 

The low end is called "labor pool" whose Worker Bees are usually temp construction workers. The middle-end is called "employee leasing" whose Worker Bees can be all trades of prefessional. The high-end is called "consulting" whose Worker Bees range from high management to politicians.