This successful flip showcased the power of strategic upgrades and partnership, resulting in a solid return on investment.

Unless you have $5 - 10k MONTHLY to spend on marketing this is what you need to do to have any chance for success with wholesaling.  

Over priced, layout is awkward, junky neighbors, back on market/under contract multiple times, bad photos, bad timing(got buried from other listings, weather occurrence, etc). 

I'd say they are both cash flow market. 

That others are to deliver success and profit to you with a bow on it. 

After all, he also was in real estate AND a successful baseball player. 

It's real estate in markets with population growth, it's pretty hard to lose money if you get an inspection and appraisal.

The guru your son is learning this technique from is likely not telling your son that the deal will almost certainly encourage your son to get an "off-market" deal from a "wholesaler" who is unlikely to properly disclose the details of the property or encourage an inspection. 

Kansas City is a really good market for BTR and multifamily investing.

I am in Tampa Florida so the investment market is huge here for both as well.