You will probably have more need for a chiller than the heaters, once you get all the equipment running and pumping in the heat. I'm west of you and have a hard time keeping my higher wattage tanks at 80F even with the AC set at 75. I never bothered with a chiller though, and most of my algae did just fine. The skimmer may be unnecessary as well, I know guys who have to dump dry nitrate into the tank weekly to keep the level up, just like a high tech FW planted tank your light level, livestock and 'plant'mass is going to dictate your nutrient consumption, and heavy water changes will exacerbate depletion.
The Acetabularia seems to pop in when it wants then promptly disappears, kind of like staghorn algae in a freshwater tank. Sealife Inc, Gulf Coast Ecosystems, and Reefcleaners (he has Halophila decipiens) are some good local online sources for algae. The best marine planted site I knew of converted to a full reef site then went completely out of commission, there were a bunch of us there concentrating on macroalgae aquascapes and propagation, sharing clippings, I miss that place. Reefcentral is a disgusting place, you're better off here with Tom if you're looking for good info. Good luck.