I would be much more specific on pricing.

You need to know the septic system rules for the area and that lot specifically. 

Any specific areas of Columbus? 

What specific websites will they advertise your vacant property on?

That is illegal unless you have specific licenses. 

Unless you find a buyer with a very specific criteria who is willing to pay above the typical 70% - repairs.

They claim to charge in the "high 4 figures" - one web source says it's $4800 - to join their group and get access to their network and resources.  

Unless you are going for a specific look, there’s no reason for an expensive toilet.

Although many properties with a specific zoning code are technically eligible, they would be subject to an extensive waitlist that could last years.

Quote from @Kristi Kandel: Quote from @Jay Hinrichs: Quote from @Kristi Kandel: Quote from @Manuel Angeles: When developing affordable housing in California (more specifically Los Angeles), how complicated is it to raise capital using subsidies?