Pre covid, I used to have gel nails done every 2-3 weeks or so at a salon. I have since bought nails from amazon, use loctite glue (not the plastic strips they come with) and they generally last around 10 days, but range from 7-21 days depending on what I'm doing. If 1 pings off, I just glue a new one on. I've had comments on how lovely my nails look!
I now buy a pack of 240 nails for £9 on amazon (Liarty Natural French false nails) and also Loctite Power gel (none of the other super glues stay fresh and usable for as long as this one) for about £3.50. Both these might last 2-3mths or more. So, say £12.50 for 10 weeks of nails. From memory, 3 yrs ago I was spending £25 every 3 weeks on infills, so 10 weeks worth would have cost £75!!!!
In the past I got so annoyed with hours and hours spent in hair salons, and disasters, that I have used box dye for years. 2 packs for £12. I have lots of grey, but still use clairol casting colours. Now lasts about 5 weeks, but 30mins sat at home with colour and cling film on head if preferable to 3+hrs in a salon!
I had a hair training salon near my old house and it was great. Yes, the visit could take longer, but the students were closely watched. A wash, cut and finish was £8!!!
I have my own IPL so shave and use that. I pluck my own eye brows and don't have anything done in a salon now, except the odd massage or pedicure.