Does the new facility include SSR?
Even assuming they get enough qualified ATCOs (nowhere near 6 at the moment) and get everyone validated within 12 - 18 months - very unlikely for a "Greenfield start" - 6 is a pretty tight ship and nowhere near enough to even consider providing a seamless service for the airfield, never mind money earning stuff such as LARS (which is what they should be aiming for).
To even consider covering their current operating hours, never mind the demands which new commercial operators will demand, you need at least 5 radar atcos on duty each day of the week, (possibly less at weekends if commercial operations are fewer - commercial means serious revenue earning movements). A simple calculation using SCRATCOH regulations will make it all clear.
As I said, I don't think that the airport owners (or the management so delegated) have done their sums properly, if they don't currently have SSR (which commercial operators will press for), they should stand by for an eye watering quote from NATS or MOD for the nearest available feed.