"It depends". You might find a lot of additional costs, depending on what you want and need to do. Small things that are taken for granted when owning a house, might start adding up quickly.
For example: when, for your job, you must receive packages, and post, additional costs for renting several post-boxes might accumulate. Satellite internet when you must have connection at all times, will be expensive. Simple things like a hot shower or garbage disposal might suddenly cost you a few €s each time. Space limitations means you'll have to do small shopping rounds, several times a week, often at smaller (and more expensive) convenience stores. Things like "a monthly subscription at the local gym" are not possible, so you'll be paying per-hour instead, often more expensive. When something in your car breaks, you'll need the fastest, closest and often only mechanic to look at it ASAP, far, far more expensive than the cheapest-goto-mechanic downtown, you found for your Yaris¹. Electricity, when available at e.g. campsites, is sometimes 100x more expensive per kWh than what you'd pay in, say, an appartment in Madrid.
And so on. Living from a van is limiting -which also makes it worthwhile!- and often those limitations make costs go up.
Source: I travel (edit: a few months per year!) through Europe in my T3 van while doing freelance programming.
¹ edit: allthough my oltimer is easy to fix myself, quite often: a bit of ductape, some WD40, a tie-rip or a bang with a hammer and all runs again. And then, I've found many a mechanic who would gladly help for a beer or a bottle of wine, and for the fun of kicking an old car, instead of his daily routine of connecting-readout-computers-to-toyota's.
For example: when, for your job, you must receive packages, and post, additional costs for renting several post-boxes might accumulate. Satellite internet when you must have connection at all times, will be expensive. Simple things like a hot shower or garbage disposal might suddenly cost you a few €s each time. Space limitations means you'll have to do small shopping rounds, several times a week, often at smaller (and more expensive) convenience stores. Things like "a monthly subscription at the local gym" are not possible, so you'll be paying per-hour instead, often more expensive. When something in your car breaks, you'll need the fastest, closest and often only mechanic to look at it ASAP, far, far more expensive than the cheapest-goto-mechanic downtown, you found for your Yaris¹. Electricity, when available at e.g. campsites, is sometimes 100x more expensive per kWh than what you'd pay in, say, an appartment in Madrid.
And so on. Living from a van is limiting -which also makes it worthwhile!- and often those limitations make costs go up.
Source: I travel (edit: a few months per year!) through Europe in my T3 van while doing freelance programming.
¹ edit: allthough my oltimer is easy to fix myself, quite often: a bit of ductape, some WD40, a tie-rip or a bang with a hammer and all runs again. And then, I've found many a mechanic who would gladly help for a beer or a bottle of wine, and for the fun of kicking an old car, instead of his daily routine of connecting-readout-computers-to-toyota's.