I have a renault master 2014 mwb high roof , dont like it but it’s practical for work and 1640 kg payload , has a 1000 ltr hot system and loads of other kit in it .
Also have an MAN TGE same as the crafter 2020 mwb high roof payload is only just over 1200 kg , 1000 ltr hot system and guessing its over weight if full haven put it on the weigh bridge yet , it’s an awesome van lovely thing to drive far to good for work , both theses vans are used in some tight places and it’s very rare we cannot get to a property, thy come into there own if needing to carry pressure washers , gutter vacs , etc , if just doing window cleaning then a smaller van might be better as the extra space would not be needed .