To backtrack a bit - when looking for a winterised motorhome (ours partially is) checkout out the pipe work, fresh water and waste tanks. The fully winterised ones will have all the pipe work and tanks situated so they won’t freeze. We have a heater for our waste tank and fresh water is on board and pipe work internal but we don’t have a double floor, so it wouldn’t withstand proper ski resort freezing.
Another thing to consider - if you are travelling Scandinavia (or anywhere abroad!) you need to consider your gas. Different countries have different bottles and adaptors which aren’t compatible. We had one of our standard bottles converted to a refillable LPG, it’s a system called GasIt (was about half the price of the Gaslow system). This means we can fill up at any petrol station with an LPG pump in the U.K. or abroad. In the winter our 11kg bottle lasts a week and our van carries two. We use the gas to have the heating on all the time, power the fridge, heat the water and cook.
If you are planning on travelling the Scandinavian countries - ensure you download the relevant apps. I use park4night for travelling in France, Spain Germany and Italy for identifying tolerated overnight parkings, aires and stellplatz. These are specific areas for motorhomes to park overnight. Also to identify service points (to empty toilet and fill fresh tank). These are often free or cheap. For example we spent 5 months travelling France, Spain and Portugal recently and only spent 5 euros on an overnight and 1 Euro on water. We’re just at the end of 5 weeks in Germany and have spent a total of 48 euros on Stellplatz (not so much free in Germany, but it balances out with the cost of much cheaper diesel and free motorways). Campsites are expensive and pointless with a motorhome abroad as you can easily find specific facilities for motorhomes many of which have electricity too.
Lastly consider vehicle weight - ours is 4 tonne which I’m unable to drive on my licence (check your licence - if you passed your test before a certain date you’ll be able to drive up to 7.5 tonne). I’d have to do an HGV test which would cost in the region of £1,000. If we travelled on motorways in certain countries like Austria we would have to pay more than those in a 3.5 tonne vehicle. That would be an important consideration for some of the Scandinavian countries. I would never swap back to a lighter motorhome though as we can carry a huge weight in our garage or tow a car.
For consideration with a drop down bed - do you both tend to go to bed/ get up at the same time?! Sounds bizarre, but we don’t tend to so ruled out a drop down bed. I tend to go to bed earlier and getup earlier where as DP sits up watching tv or reading. We have a fixed double bed at the back (over garage although our previous van had a rear fixed bed with no garage). So it means the living room area is always there, not taken up by the bed. It also gives an extra lounging area in the day. I love parking up on a mountain top and lazing on the bed looking at the view!!