Chris, I think (based on your description above) that your issue is deeper than just finding SD IRA custodian who can help you get that investment in your IRA.

You can use Zillow key word search to see when agents put "assumable" in the description of the property: There may also be a middle ground where you can find a property that is not turn key but also not a super fixer, and do some work yourself (this is what I did). 

The original post wasn't very descriptive about your "deal", but if you're planning on reselling I would consider the insurance issues that you may encounter. 

I am looking for geographical insight to the markets.

Both are heavy with practical advice on how to furnish a place, how to set up a listing, write a headline and description and vet tenants.

One very important thing to know with Tax deeds is to do your research, never buy one you haven't personally seen,(not a picture) and to double check everything as the properrtied sold at auction are sold by their legal description , NOT by the address.

Question: do appraisers typically read the current (or past) listing descriptions for properties they are appraising?

While I was searching for real estate podcasts, I saw something called Unlisted with Brad Inman podcast.It only has a few episodes and I haven't listened to it but the description of it caught my interest.

(10%)13.When you advertise your job on Odesk, give the rough description of the job.

In there should be description of where the Assocation's building ends and your unit starts.