There is also a software named LandVision from LightBox that has a good layer that lights up every parcel that has traded in the vicinity and timeframe you are looking for/in. 

Is there a name for this type of “group” loan?

Got them through a local community bank in Los Angeles, where I and my businesses are located.30 year terms, 30 year amortization. 

You might try to track down some local lenders who are experts in condo lending to see if they would finance them. 

Leveraging my expertise in property acquisition and renovation, I guided the client through each step—from identifying the ideal property and negotiating the purchase to overseeing the conversion process.The conversion involved reconfiguring the existing layout to add an additional rental unit, ensuring compliance with local building codes, and maximizing space efficiency.

Does anyone have any recommendations for local investor friendly title companies in Riverside, CA that do both assignment of contract and double closing?

Not positive about a co-signor, it's possible to purchase in foreign investors name with you/other on title and deed.

There is probably no regular trash pick up or it is by a local guy with a truck3.)

If you are calling an area you live in, you always lead with that, "I am a local homebuyer/wholesaler and live only a few blocks away, went to this high school, etc."

Talk to some local PM companyAccounting - 1 size fit all or you can have multiple ones that handles the property level and the corporate level.