Mark,
There are other investors on BP that are better to speak on the Florissant area than me. I would search "Florissant" in the forum and see what people are saying, there is plenty discussion about that. My personal investment focus does not go above highway 64 if you look at map of St. Louis. Florrissant, which falls above that highway 64 marker for me, is an area that was a very popular and growing suburb and nice place for families to live in the 1970s, 1980s, and early 90s I'm told. I have several friends who grew up there. It remains a working class area and has quick access to highways.
But to my understanding, Florissant and the surround areas were a victim of "white flight" in the 90s and there was a significant financial retraction in North St. Louis - some municipalities hit harder than others. Including Ferguson, which as you likely know made national headlines in recent years, which is about 4 miles Southeast of Florissant. Here's a link to an article in TIME on what they describe as white flight in St. Louis that was written after the Michael brown shooting - i make no representations regarding its contents or state that i agree or disagree with what's discussed in it, it just came up in a google search for white flight and st. Louis, nothing more. I'm sure i could have found articles with other opinions, statements, discussions, etc. but this was the first link.
Certainly I would not turn down a deal i thought was worthwhile simply because it was in the City of Florissant. The specific street and surrounding blocks for this house, i have no knowledge. But I would make sure you do your research on the local schools, crime reporting in the area (you can see crime maps and get information from the St. Louis Post Dispatch, the City of St. Louis, www.homefacts.com, etc.). Search the address in Zillow and Redfin filtered for houses for rent to see what other people are charging for similar houses.
As far as a home inspector, we most recently used Lou Voss from Countywide Professional Home Inspections and were very pleased and will go back to him again. His contact information is (BP won't let me post his phone number of e-mail address so PM me for that if you can't find it):
Lou Voss
Countywide Professional Home Inspections
1038 Pebble Beach Dr
O’Fallon, Mo 63366
I would also confirm that if the repairs done required permits, that the permits were pulled and inspections obtained. You can get a lot of information from property in St. Louis County by searching the property address at https://revenue.stlouisco.com/ias/