OK - lots of assumption as always on here - so personal experience - First hand:
If you have the $ take both.
- Confinement lady (can be hired 24/24 7/7 or a few hours a day, several times a week etc - you decide) - is helpful in cooking the right food for the woman to recover post delivery. Some westerns hit the gym to and get a personal coach to get fit and healhly again, Chinese, get a confinement lady. Can be as "cheap" as 9-10k a month (6hs a day). They are pro and any good one wont insist on anything at all (re formula BS or whatever) but will work with you and be a good help for a month.
- Get the helper for all the rest + the confinement lady can teach her how to cook the special food so she can keep doing it a few weeks after.
One month imho for the confinement lady is enough. Many do have some English skills.
If you have no support, ie no family around and are working, it's well worth it.