@Frank D. - Some qualifying questions (you can DM if you prefer to):
(1) Are you interested in cash flow, equity growth or both?
(2) Have you ever invested passively with a private placement before? Is this something you've looked into?
(3) Why are you interested in the markets you listed? What about those markets metrics do you like?
(4) Are you only looking for Multi-family? Have you considered other sectors?
(5) What are your income goals at the moment?
You've clearly done well. Without answers to some of your questions above, I would say find a way to distribute the $$$ across the board. Some % investing passively with a syndicator or fund manager in an investment class you have an interest or would like to learn more about. Take a % to invest actively on your own where you can control your own destiny. Lastly, keep anywhere from 10-50% for dry powder. I've often thought the same thing you have; the market is due for a correction and I should wait for the next big draw down; I thought that 3 years ago. Imagine the amount of $$$ left on the table during that period. You should certainly be scrupulous about where you put your money and keep some capital lined up but don't wait for the next big hit. There's too much opportunity cost associated with this strategy IMO.