As mentioned, I would be doing the same thing with other groups.

Third As mentioned above, we are looking to enhance our solid reputation and build credibility in the Real Estate Community.

As mentioned.

I don't know much about these companies, but it seems like a not great idea yeah, i mentioned that in my post above

Should I mention upfront to the owner that ultimately I'm interested in buying the duplex?

Both the furnace and the water heater are getting up in age. 

, I'd say that you qualify.Since you mentioned partners, from my understanding: if you keep the integrity of the partnership (all partners selling will be the same partners buying - and under the same partnership name,) this should be an easy exchange.

Would you recommend one partner provides more cash and the other partner is responsible for the previously mentioned duties?

After an application is received (which is after more rounds of pre-screening) I'd look into something like a deeper check into credit and address history as mentioned above @Carrie Albertson.

I am hesitant to invest in the C neighborhoods for exactly the reasons you mentioned.