Ok, this is going to be kind of long, but I'm not sure if I should apply for this position or not.

I'm an ER RN, I currently work a 1.0 FTE (full-time equivalent -well, when I go back to work in May). I have always always always worked full-time. I work 12 hour shifts, 8-8, days/nights. On average, I work 3.3 days/week. I love my job, but it is high stress. We will be paying $975 for daycare 3x/week. My husband works a "normal" 9-5 job with flexible hours, but may be starting his online masters program in addition to working full time. We have a high needs dog.

A position has become available for an evenings (4-midnight) only position, 0.6 FTE, which means I would work 3 eight hour shifts/week. I'm so tempted to apply, because
1) working less! Yay! More time with my daughter - with 12 hour shifts there will be days when I don't see her at all.
2) it means I could walk the dog and start dinner before shifts when I work, which would ease the load greatly on my husband those days
3) I'd be bringing home approximately 1200 a month less, which is nearly offset by the daycare costs
4) we wouldn't need daycare at all because my DH could work 7-3 when I work and be home in time for me to go to work
5) my mil is planning on retiring in June and has offered "backup" daycare if needed
6) easier on my dh if he is in school

However, this is what is stopping me
1) we wouldn't have daycare if we needed it
2) I wouldn't be in a position to pick up overtime shifts because of the lack of care and also ot isn't offered to pt people very often
3) I wonder if my dd would benefit from being In daycare as my DH and I are both strong introverts and I don't know if I can provide enough social stimulation for her
4) my pension would be affected
5) might actually lead to less me-time as I can't drop her off at daycare for appointments, etc.
6) it's less money.
7) my work is changing their shift schedules, and I don't know what that will look like. This could be as early as June. We choose our rotations based on seniority. If I continue to work full time, I will have a top pick as there are few of us working ft and most of them have less seniority than I do. If I work a 0.6 I will get bottom pick.

I struggled with work-life balance already before i had my dd, and I've been very very worried about it upon returning to work. We absolutely 100% need my income, as I make more than my DH. These 0.6 evening positions don't come up very often and are fairly coveted. There's about a 70% chance that I would get it based on my seniority, and I would hate to be offered the job then refuse it. I will likely end up working a 0.6 eventually after we have a second child because of the daycare costs. I can go back to full time if the 0.6 isn't working for us, but we will lose our spot at daycare.

Sorry for the novel - I'm really, really torn!