I don't know a ton about tax lien investing but my advice for note investors is to be selective as to when you order title reports (can get pricey if you run too many), but it can be wise to pay a bit more (two-owner search, for example) for a more thorough search for those assets you are likely to purchase.

Any particular part of the city you want to live in....giant place.What drives the purchase?   

Or lease with purchase options, these are arguably the 2 forms most vastly used over more years than I can recount, generations. 

Purchased various sheriff auctions, short sale, low-balling, flipping, being a landlord and much more.If you are stuck, not knowing where to turn, please feel free to reach out, All the best

Purchase price: $90,000 Cash invested: $50,000 Sale price: $289,000 4 family building purchased in distress in Mount Pleasant neighborhood, previously owner occupied for quite some time, the owner could no longer care for it.

How are you financing your purchases in this lending environment?

Quote from @Theresa Hansen: Make your purchase contingent on removing the squatters first so you can inspect the property. 

I've been succesful with this strategy in my area (San Antonio) and have flipped the lots within a couple months of the original purchase.

We purchased for 120K and owe 137K (current construction draws).  

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.