I knew it, diys not as simple as they say! Finally an admission
lol
I know what you mean about space to work or even set up. Mine wouldn't have been possible but we had one of our kids move out, so freed up a room in the basement, another kid moved downstairs, office moved to upstairs bedroom and I get a fish room! Timing worked well!
I can't help with the 180 but I'm sure it will be fine. Having the tank sit on my floor for 2 weeks was torture, can't imagine waiting longer!! Do you have a tank going now?