I wonder if DH and I can work as a team for multi-day stays by alternating 1 night stays? (I'm not sure how much of a fan DH will be on this, but I will ask him.

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This feels like playing a game Pacman where you go about collecting the energizer points

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Find a city/town with two different Marriott brands, not too far apart, and alternate betweens them , yourself.
There are a couple of properties that I wanted to check out, but I have been hesitant to try because I am not sure how convenient they will be. I'm might give them a try because a 1-night stay would not be a huge risk if it turns out to really be a huge pain.
Well, if if the couple of properties are ...in another country/city far enough away that you must fly or otherwise the transport cost to get to the couple of properties is relatively "large", factor that and your time into the cost of those couple of properties , and is it worth the price including transport to/from the properties.
I wonder if I pick a hotel in the Tribute Portfolio Collection--does that complete the category for the EQN bonus purposes?
Stay at one Tribute brand , that completes the category