The one in Groesbeck doesn't quite tie between starting balance, rate and payment. Was there a time in the past it was non-performing and maybe some interest got capitalized, or principal is maybe slightly behind schedule?
If you could buy it at $33k, it implies a ~15% interest rate with almost 25 years left to go.
Assuming there weren't major payment problems in the past, and you wouldn't mind owning the property if you had to foreclose, that one looks attractive to me personally.
I have a friend in this space and the occasional one that a client has the oppty to get. My guess is you could negotiate down a bit from $33k based on my limited experience around these.
The small scale is the biggest issue here I'm seeing (unless property is complete piece of crap, meth lab, hazardous, etc...). For getting a start and putting $30k+ to work, looks good if ok with illiquidity.