I'm a SAHM in an area where people tend to look reasonably "well-groomed", whether they go to work or not (Chelsea, London). I think I'm fairly low-maintenance for this area. Regular expenses would be -
Hair cut / semi-permanent colour - under £200 every 6-7 weeks. I have dark brown, quite thick hair and just started colouring in the last 12 months (now aged 40) - since the greys started!
Hollywood Wax - about £50 as and when needed, though I can go much longer between sessions now as the hair has become much finer. I do my own eyebrows and hsd legs lasered years ago (god knows how much that cost).
Teeth whitening every so often (can't remember how much that was).
I rarely do facials etc as don't have any specific skin problems. No point in eyelash tints as eyelashes are black anyway.
Gel nails every 2 weeks at £30 I think.
I will probably get forehead botox quite soon to smooth horizontal lines that I'm beginning to notice. Then it will be a slippery slope from there, no doubt!
I use Estée Lauder EE cream over one of their serums daily. Black mascara and eyeliner -whatever catches my eye in Harvey Nichols or Boots!
I do 1:1 Pilates 3 times a week which works out around £35 per session but well worth it!
I don't spend loads of clothes but spend a bit more on things that will last - high street shops like Maje, Question Air, Claudie Pierlot, Alice and Olivia, Sandro, etc. I don't really like to look obviously designer, so mix those kind of items with high street items.