Motorhome Depreciation

Foodsman wrote:
I have seen it said that you can pretty much plan on taking 35% off of the MSRP when purchasing a new Class A motorhome Gas or DP. I have also seen a good number of dealer prices to support that, especially when new models are about to arrive.

I’ve also seen a depreciation schedules looking something like this...

Year 1 18%
Year 2 10%
Year 3 7%
Year 4 6%
Year 5 6%
Year 6 5%
Year 7 5%
Year 8 4%
Year 9 4%
Year 10 3%

My question is two fold;
1. The 18% that comes off the 1st year, is it based on what you paid for the motorhome (after taking off the 35%) or is the amount of deprecation based on the MSRP?
2. Does the depreciation schedule hold by brand or do some brands hold up better than others? (Lets exclude buses like Prevost)

Thanks,

Harry