IMO, the best strategy for that type of individual is to purchase residential property in an area they are or can become familiar with; in an area where the neighborhood is “on the rise”, typically where demand exceeds supply and people are spending $$$ on fixing up properties.  

An appraiser likely isn't going to spend time giving you much feedback in advance (unless you have a connection or they are super slow).   

While I don't object to spending money to do one's due diligence, I don't know if $500 is called for when you can get very high quality syndication groups/meetups/information for free.

So spending 200k on an ADU will likely not increase your property value by 200k. 

I provide my application and screening criteria on my website so applicants can look for themselves before spending any money.

Would you spend that much for a shot at making 200 a month?  

This opportunity doesn’t occur frequently but it takes these attributes to take advantage when they do.3 - Blind luck - do enough deals, the unique opportunity tends to present itself.  

• The “Tour Guide” makes the opposite mistake: they spend all their time pointing out flaws and justifying a low offer.

If you want it to run well, you may be spending a lot of time at the property.

This lets your HSA grow, and since qualified withdrawals are tax-free, putting more aggressive investments in an HSA can pay off in the long run (similar to the “put your risk in Roth” idea).4.Rollovers & Debit CardsMost brokerage HSAs come with a debit card, so spending isn’t too hard if you ever need to.