What would the next steps look like in terms of finding partners, financing, and handling zoning or permits?

For those following along at home, that language is found in Title 10, Chapter 1, Article E, section 6 (or 10-1E-6) in the municipal code.It reads: "The renting or leasing of real property for residential occupation for periods of time less than thirty (30) days is prohibited in any zoning district within the town, except as permitted in this title for hotels, motels and bed and breakfast inns."

Basically, it sounds like you just got your learner's permit to fly a small personal non-commercial plane, and instead, you went out and bought a fighter jet... 

Building permit lists are public records that document permits issued by local government authorities for construction, renovation, or demolition projects.

Like other cities Indy doesn't have progressive zoning and permitting laws.

If it were me I'd pass or do a substantial escrow holdback until you knew if things were properly permitted, etc.

How much value would I add with a permitted ADU?

We would handle the structure and property design, planning, permits, bids, sub-division (if needed) for the project.

Other exclusions are roof replacement, anything requiring a permit, exterior painting if more than 5% of surface, "maintenance related to the garden, lawn, or landscaping," anything covered by any of the various required insurance policies, etc.

Tax records have nothing to do with permits etc.