If the idea of logging into yoru account juust once per day to check campaigns appeals to you then this is exactly what a PPC CPA business can offer you.
The genius behind arbitrage conspiracy has that lifestyle. He has a three person operation that regularly builds campiagns that last up to three years. Once the research has been completed and the system is put in place the only other thing to do is groom the campaign.
Just a laptop is required to run a PPC business. There is no stock, very fe staff and no building required. You can operate wherever you are in the world.
To learn this style of business see the material here at arbitrage conspiracy.