@suearcher @Maker_of_Things @helenclayton @IcooIey The van is fairly old, but we like it. Each time we use it for something that would otherwise need a hotel stay, I put £100 aside as money saved. A few weeks ago, the alternator blew. Fixing that, and getting some other work done for the MOT, wasn't cheap. But the "not a hotel" slush fund just about covered it.
In a few months time, we'll have paid off the financing on our solar panels, and we can start saving for a better van to convert. For now, it's doing the job, though.
And yes, discovering motorway services was a real eye opener. They're almost all around £15 for the night, with showers included (so quite a bit cheaper than a camp site) and are, obviously, in fairly convenient locations. The only one we tend to avoid, on our usual trips, is Lymm because it's fairly busy all night and can be a bit loud as a result.