We always have fix and flip wholesale and retail properties.  

I would suggest waiting to see how COVID-19 and the massive eviction crisis plays out. 

I am a buy and hold investor and have experience in residential, mixed use and retail.  

If you really want to buy some of these types of courses you can sometimes find people selling them on Craigslist and Ebay who paid retail for pennies on the dollar.

There isn't much analysis about it between these sources, the box store is the only reliable source along with other retail outlets, lumber yards, etc.You don't devalue a nice property putting junk in it, what you use needs to be appropriate to value. :)

here's why:  in a seller's market with, for instance, under 3 months' supply/inventory your normal seller is going to see properties being sold for full retail prices within very short periods of time.  

I've spent the last several years conceptualizing on getting into real estate... reading a ton of books, got my real estate broker license, tripped up on trying to be a retail broker and an engineer for a brief episode, looked at properties and got paralysed in the analysis... and this time it's different.

Lots of people complain about the lack of deals in SoCal, but I wholesaled around 25 houses this year, plus I kept a few as rentals and retailed a few more.

With him, in future I am planning on investing in retail real-estate property (considering some NNNs).Please let me know if there are books/pdfs/posts  that are must for the newcomers. 

Is it a retail flip, lease option to a owner occupant, or selling to another investor.