Quick home electric question

Thanks for explaining all that to me
The first option (mechanic lockout) is what I intended to do from the get go
I even moved all the existing breakers around to get the generator breaker on the top right position

It wasn't until later that I found I installed it in a sub panel and what I thought was the mean breaker, did in fact, nothing

IF i can get the meter switched to that spot, I will continue as planned

Otherwise, I need to really consider this while deal

option 2 is a no go, because no matter where i put the genny, i have circuits on both panels i need to run in order to keep things going

Even if I wanted to install this in the main panel (which I dont because it places the generator on the side yard, in the snow) I dont think I could because I dont have room on that panel for another 30 amp breaker...unless I could find a few more of the "split 15" breakers


option 3, the big ole switch, i would be OK with too, but again, it puts the genny out on the lawn

so i would really like to just get the meter moved and install the lock out