Finally was able to talk to the Previa driver in the basement as he was fixing his van. Very accommodating si Manong from JICA. Inabante pa niya yung oto para makita ko yung space sa likod. Inalok pa akong umupo, nahiya lang ako. Hehe!

Anyways, though I wasn't able to bring a tape measure, by my reckoning, 2 wheelchairs will fit in the space behind the 3rd row. It's more spacious than an Innova back there, but not by a whole lot. 1st and 2nd row accommodations are topnotch, with the 3rd row a little bit pinched if the 2nd row is moved real back. This looks to be what I'll be recommending. It does have that posh feel despite not having that many doodads at the back.