Home inspectors vary wildly in terms of their skills and knowledge, unfortunately. Best bet is word-of-mouth recommendation from someone you trust. It sounds like you want someone who has been inspecting houses for a while (at least decades), and has perhaps owned or worked for a company doing foundation repairs. (But obviously no longer does.) I like the ones who will talk your ear off about their trade because it shows that they're both experienced and interested in their work. Insist on following the inspector around the house as he does his work and ask lots of questions.
My unprofessional and potentially unreliable opinion: if the house has stood for 90 years, it will probably stand for 90 more. The fact that there have been repairs isn't problematic on its own and might even be a good thing for you if the repairs were recent. Generally, even the untrained eye can see serious problems developing. I personally wouldn't put anything particularly valuable in a basement that old, but that's due to the possibility of minor water leaks rather than structural unsoundness.
But yes, get a good inspector. Where is the house? Maybe someone in the area will have a recommendation for you.
