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I'd get something like this https://www.bike-components.de/en/bc/Urban-XT-Disc-Center-Lock-28-Wheelset-p56262/
Cheap handbuilts from Germany, they do a dynamo version too. XT hubs. Good value IMO.
Cheaper with Alivio hubs and A119 rims https://www.bike-components.de/en/bc/Urban-Alivio-Disc-6-bolt-28-Wheelset-p56222/
Rose bikes also do cheap handbuilt wheels https://www.rosebikes.co.uk/rose-28700c-mavic-a-319-shimano-deore-xt-780-hybrid-wheelset-247983.
Folks opinions on this wheel set: https://www.ebay.co.uk/itm/Bontrager-Paradigm-Comp-TLR-Disc-Wheelset/223088788228?_trksid=p2485497.m4902.l9144
Seem pretty light at just over 1.5kg - with tyres and discs/cassette I might be able to do just over 2kg.