Hi @Guy Yoes,
I may have this backwards but I would stay away from MFs and go with SFR as long as you buy them right. I feel the SFRs are more liquid then MFs. But that could be in my market. I agree with others that are focusing on replacement costs when targeting properties to buy. With the real estate boom centered around 5+ years of building apartments I feel that is where I don't want to be. So if you can find SFR that are close in to urban centers I feel that is a safer investment. I might be the only person that thinks that way though. I also like SFRs because I can sell one whereas it is hard to sell 25% of a MF property. BUT, I am a small fish and learning to get scale.
Your question regarding what to do with the dollar dropping and the fed raising rates. If you buy things that are real and at or near replacement cost, inflation will be your friend. If you can buy some cash flowing assets and allow for liquidity when needed that would be ideal. Examples would be another property leveraged properly and possible room for a HELOC. Another idea if you have the expertise is to buy cash flowing stocks (i.e. dividend) and open up a security based lending account against the portfolio for liquidity. Just make sure that in all cases the assets are cash flowing (cap rate) at a higher rate then the borrowing costs. If the rates are floating then target a 3% spread. Also, it requires a lot of research because of the risks relative to the returns.
I am not a big fish at all but hope to be so in 20 to 30 years. I do all of the above strategies.
I agree with @Michael Rutkowski on being flexible. Also, go with what you know, feel comfortable with, and understand. Sounds basic but I remind myself all the time to do that because there will always be good deals to come.