With your own equipment that you can buy secondhand via e-bay and maybe elsewhere I would virtually guarantee you will do better than the lab you describe on your first attempt, just by sticking to the times, temp, agitation routine etc given by the developer manufacturer. It is a fairly simple mechanical process. That's why machinery, properly set up can do it in labs.

Oh and at 13 euros per film you will recover your cost of equipment after just a few films.