How is your assessment of this? Are the installed materials okay?
No one can judge that from the outside. You need someone to accompany you. The first time, a friend or someone who looks at everything with neutral eyes. If the chemistry between you/yourself and the house is right, then bring in a construction supervisor/expert.
What you mentioned is okay and harmless and is still partly used today. The pitfalls lie in the adhesive, the wood preservative used, Xylamon inside?, electrical system without RCD protection, cellar often damp.