Comps are simply what other houses(similar configuration, age, square footage, geographical area) have sold for. 

While Qbooks is a robust system that can be configured for property management, it is certainly NOT a property management solution.

Common commercial loan configurations: a. 100 CLTV (OO-NO DOC)b. 97 LTV (if OO-FULL DOC)c. 95 CLTV (if NOO-FULL DOC)d.

Is there another you recommend, that is easily configurable by a 3rd party consultant?

If the unit configurations would comply with duplex occupancy as a triplex, you should be fine.

Hard to say what's best and most cost effective without knowing the configuration and size of the units.

I'd say it's subpar to the surroundings  and the configuration of the lot, I think this house may have to maintain it's current footprint.  

It is definitely not a "set it and forget it" type of thing.You either need to commit at least a few hours a week to your SEO efforts (which includes link building, meta configuration, blogging, videos, etc, etc, etc) or hire a professional.  

The basic issues I would investigate include:What type, configuration, location and rent range do they recommend?

We are still in the configuring stage but if can get to do what we want, it will be a game changer for us.