If you can maintain ~1000TSS a week then you shouldn't have any fitness concerns for LEL, that's for sure.
I can just about do that in a week without intruding into family time, but I only work 4 days a week so one day (during term time) I get 6 hours to myself whilst my daughter is at school. I can do about 5h exercise in that time, so a good chance to get 350TSS in in one hit (well, a 1h15m swim and then a 4h cycle, or shorter cycle and a run), the rest is spread out over the week (5-a-side, cycle commuting, running, lunchtime swim, etc).
Doing 1000TSS/week week in week out I've never managed, something always gives (injury [usually from 5-a-side], school holidays, etc). I think my CTL peaked at about 80. I haven't tried to work it out for my 50 point season, mostly because I didn't have a power meter then.