Sounds like fun the initial start up stage is so much fun. Fowlr
is a good way to get started it doesn't require the special lighting that a reef does. My suggestion would be to cylce your tank with the live rock. The stuff on the rock that dies during shipping is a great way to jump start the cycle. Or if you get enough cured live rock locally you can even barely see a cycle. 1.5-2 pounds per gallon is suggessted so a 90gallon about 140pounds definately not cheap so shop around I bought from 2 companies online. I bought some carribbean from Welcome to International Marine Fish - Premium Live Rock
and some fijirock from LiveAquaria they had the best rock and wasn't really that much more money. Even with shipping it was much cheaper than locally. You can even buy cheaper base rock to mix with the live rock to save money
My rocks are not glued together I just stacked them on top of each other and they are not going anywhere. The pieces I ended up with fit together nicely Live aquaria sent some big pieces with lots of coraline algae and the carribbean rock I got had more shelf like pieces.
There are some Macro algae that look like plants to go in the main display but if you want the look of plants you should really do a reef
Just to add some key tips I learned are buy a refractometer for testing specific gravity there about $45 but well worth it. And buy a RO
unit for making pure water don't use tap water. RO
units are about $150-$200 it should be the first purchase otherwise you end up buying distilled water and transporting it home.
Starting a testing log to record results and write down happenings will be usefull when trying to diagnose any problems you may have.