(Yes, there are a few other crazy data hounds out there.)   

So far my screening and qualification process has helped protect me from falling prey to those who are trying to get their pets into our properties under false pretenses.Check out the numerous BP threads where this topic is explored in depth.

Alternatively, lawyers can become brokers by filing simple paperwork so may be another avenue to explore if not looking to be a full time realtor/agent. 

In the areas discussed above, you have to take rentometer with a big grain of salt but in a neighborhood like the old west end of Richmond in the JR Tucker High School district there are an overwhelming amount of very similar 3bed/1bath brick ranchers so you can be a little more confident in the comps rentometer gives you.Market knowledge and familiarity is key (and cannot be gotten simply by surfing the internet, no matter how well the data is represented) which is why you should consider working with an investor-friendly Realtor (shameless self-promotion aside...). ;)

I created a profile on the BP site quite some time ago but didn't really start exploring it until recently.

I haven't explored that option. 

Also, we would need more data. 

Instead of prospective tenants you have potential buyers or sellers.The tools are there if you can just think of it as property management but you are using it for land.You can keep listing data, pictures, contracts, deeds, parcel maps, advertising propaganda etc in the property file/page.

I'm looking up properties on my tax assessor's website.  What does it mean when there is very little or no sale/transfer information or when the sale price is listed as $0 (as seen in the screenshot below)?

I posted data in a thread last week.