Jetlinks haven't put anyone through a type rating they use contract pilots.
There are 2 options for J31 ratings you can go the sim solution which is 8 sessions of 4 hours. Sim is @ 400 quid an hour and the TRI/TRE is 900 quid a day but that does a crew. Then LPC which is 4 hours and 900 quid for TRE. Base training again is 900 quid for the TRE and 800 quid an hour for the airframe plus approach fees. Factor in staying in Sweden and flights to Sweden it ramps up.
Second option is in the aircraft which I think is 8 hours min and you already have the 6 landings so you don't have to do base training.
After training it is very rare in the UK for jetstream 31/32 pilots to ever see the sim again because of the costs. All the checks are done in the aircraft.
Which if you don't have your own TRE are going to cost 2k plus per pilot.
Tech training last time I heard was under 2k for the 2 weeks.