Search Van / bus for 4 children (+ space for strollers)

Hello, we are currently driving a Toyota Verso, which is sufficient for 5 people so far, but since there is another new generation, something bigger has to happen. Budget would be approx. 25,000€, not older than 3 years max. 45,000km, sliding doors would be nice but no need. Application profile: Mainly short distance in urban traffic (between 3 and 15km), during the holidays / on weekends irregularly even longer distances, like approx. 12,000km a year. To the driving profile probably no diesel (or?) fits and thus fall most buses (Tourneo, H1, Vivaro & Co) through the grid?!. VW T5 / T6 can hardly be found as a gasoline truck and are too expensive for me. The compact vans with their “emergency seats” (which I also count to it) also fall out, with 6 or 7 seats there is definitely not enough space in the trunk for prams / purchases and also sometimes holiday luggage, so I am open for all suggestions Thanks already.