Preferred would be drop off in the morning and pick up in the evening. Or I can stick around and help you so we can get it done faster? I’ll just let you do the front compressing of the springs cause like I said…spring compressors are like the plague to me. Can’t even explain why I hate them so much.
Here is a general install howto for my car (it’s actually for an FX35 - but similar setup) to give you an idea of the time needed:
http://www.infinitiscene.com/forum/threads/9333-2003-2008-FX35-FX45-BC-Coilover-Install-DIY
I’m not concerned about the winter height. Just the maintenance (which springs have zero of). I drove a Maxima that was even lower than this will be once it’s dropped through a blizzard or two with no issues.