I have NEVER paid to have a hem taken up in my life!!!! I used to do all my sewing and even that of many of my friends. Now as my hands are quite crippled with severe arthritis despite my relatively young age,I cannot do this anymore.I tend to buy Capri style pants which are mid-calf and never need taking up!
I don't wear jeans but I can take up a hem on anything, it's a very simple and quick job on trousers but skirts take a bit longer as they have a lot more fabric!
Sometimes with my husband's really expensive work trousers, I get them properly taken up by a tailor as then they put on hemming tape which gives some extra strength to the hem and ensures the trousers last longer.
Yes I have always done them myself, now it is a pain as I can't see as well as I used to and have to set myself up in the study with bright light etc...almost can't be bothered! haven't done for awhile, not that big on jeans