That's honestly an extremely simple process.

I'm curious to know how often property managers actively suggest value-add activities for properties (ie, building an ADU, remodeling, buy-fix-hold opportunities etc etc). 

I also agree that RE appreciation is unlikely to match the last dozen years, but you never know.Where I am unsure we agree is that paying $450k to improve the cash flow ~$3k (your numbers but I expect my delta wold be similar meaning both my cash flow estimates would be worse than yours but both would be worse by the same amount not affecting the difference) makes sense especially if the cost of having the extra $450k is only 6% rate which is historically simple to beat via numerous investment options and hopefully no one is investing in RE for an expected of 6%.  

What strategy would you suggest I follow instead?

Its not as simple as using eviction law even after you closed and now are the owner. 

Any suggestions or insights are appreciated!

You have some good comments above but I would also suggest to try some local real estate meetup groups.

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

Even something as simple as utilizing ChatGPT to speed up certain processes such as asking for generalized information on a market's demographics and immigration patterns can be useful and save a lot of time.

@Vijay Singh SambasivamI would suggest speaking to local banks, and credit unions.