Paving parking space

I want a company paving a parking space with gravel and asphalt. It might need some digging but it is a very small area (about 20 M2). i also want to put some concert blocks (hagekantstein) or granite on the side (7 m) to make a clean finish and secure asphalt. i was wondering if you are interested and if so, i hope you could give me a rough estimation of the cost and the time you need to finish the job and tell me when you can start.