Personal Trainers are definitely not within everyone's budget. Here are a few things I would say though.
Many people who are not in shape and in pain are seeing multiple practitioners weekly. (chiro, massage, physio, accupuncture) I sometimes wonder how much "maintenance" on the body could be avoided with even 1x Personal Training per week.
I have had conversations with clients who spend a lot of money on things that lead to their health decline:
Fast Food: $100-150/week
Total: $155-240 conservatively
I'm not the fun police. I can assure you of that. But if we're all being honest. $ spent is based on value. If you value your health. routine, professional guidance. A good personal trainer can be a great idea for many people.