What can replace wood paneling?

Hello everyone,
I have a kind of party room in the garden or on the yard that I only use in the summer. Now the wooden boards that serve as cladding are slowly looking unattractive and I want to have the room clad on these two sides (see photo). The whole thing should be clad, plastered, and painted.

What kind of material can be used for this? Under the wood, there is only stone wool and battens. Great insulation is not necessary.
The painter will come next week to prepare an offer. What would it roughly cost to have this done by a craftsman?

In other words, take down and dispose of the wooden boards, install new cladding, plaster, and paint, etc.

How about just a trip to the hardware store and an afternoon? Buy paint, repaint, and that's it. If you don't necessarily want a visually designed extension and have way too much money left over, the craftsman with the services you mentioned is wasted money. Or do you buy a new car when the old one is out of gas?

1.) Painting is pointless and is not up for discussion. It was also newly painted just last year. The problem is that the wood is finished, and the grooves and tongues are breaking off, causing gaps to form. It needs to be replaced anyway. 2.) I don't want any more wood; it should match the other buildings. Attached is a photo of how I imagine it visually (like the residential house). 3.) The question was about the costs. If it costs up to 3,000 euros, I'll have it done. If it's more, I would have to consider whether to simply replace the wooden boards. The area isn't exactly large. PS: This is off-topic, but I also only drive my cars for one year. So why shouldn't I replace wooden boards from the late '80s or have the cladding changed?!

You can, for example, screw fiber cement boards on and plaster over them. Costs?

Ok, that would be exactly the question

You can of course completely renovate and change the wall type if you don't like the wood look. If the wood is from the 80s and only finished a good 30 years later, that certainly speaks for a high-quality version of tongue and groove elements. Screwing something onto the old wood does not promise to be a long-term solution.