Fortunately the appreciation has produced outstanding overall returns.  

In today's day and age of social media, the Internet and super catchy reels and videos, attracting your attention to higher returns, promising life changing strategies and tips on how to quit your 9 to 5 job; A lot of people really neglect what real Real Estate investing is all about. 

I do this because I feel I can over the long run attract and KEEP better tenants LONGER.

That will minimize your turnover rate and make it a lot easier to attract quality house mates, plus you'll build equity quicker due to more rapid appreciation which will enable you to tap that equity and build your portfolio quicker. 

How will less revenue attract more buyers?

To your second part of the question: Most multifamily will be tenant occupied, which means they are producing income.

Depending on how many years you have own each property, maybe it is time to assess them: their individual performance, ROI, what type of tenant do each attract?

Can you offer tips that aren’t going to produce properties that are on every list imaginable?

If your property has appealing features like a pool and a nice backyard, it could still attract buyers, especially families.

Start a business that produces cash flow.