core drilling 162mm for kitchen extractor vent

instructions on my vent - eiQVENTKIT150COWL - Say that a 162mm minimum hole size is required for the kitchen vent.

I already have a trusty Titan TTB631SDS which has a safety clutch, but I am told that it shouldn't 'really' be used for doing core drilling, and that 162mm is quite a large size which should be used with a specific type of core drill - Hilti 110's / Makita DHR242Z etc. Which for drilling 1 hole I would not see the return in buying outright, renting I think is around £90 a day approx.

Not many places also have a core bit which is larger than 150mm, so the 162mm core bit I am just thinking to go and buy anyways.

https://www.toolstation.com/mexco-premium-slotted-dry-diamond-core-drill-bit/p30062

I'm just wondering if its just moreso a suggestion that you cant use the Titan for this type of job and that if you basically just take your time and go slow it would be alright. Its just for a normal residential property so brickwork, blockwork and a cavity. Thank you for any advice in advance

I had a 6” core drill and very rarely used it. Having said that when I needed it I had it in my garage

The titan will do it, to make it easier on the drill I'd start the core and once the core bit is about 15-20mm into the wall remove the core and use an sds masonry bit to stitch drill all the way round the groove the core has created then use the core drill again to finish the hole.