Hi nitecapt,
Compare the 2019 MB Sprinter chassis to the 2018 model year. MB increased the chassis load rating significantly for 2019. Along with that increase came all kinds of safety bells and whistles. It's all good stuff but it came at a very hefty price increase of nearly $10,000. It explains why a 2019 motor home built on a 2019 Sprinter chassis is so much more than a 2019 motor home built on a 2018 Sprinter chassis. So if you are price sensitive, you might rule out a new 2019 and go for a lightly used 2018 or older.
As other people here have encouraged you, don't be too quick to rule out the Ford E350/E450 chassis-based motor homes for they have their own list of advantages. But if you have a love affair with MB, then at least you now understand why the recent ~$10k price hike for a 2019 Sprinter chassis.