You can buy personal training services, workout gear, a home in traffic-calmed neighborhoods where you aren't jogging or cycling along rural highways, a pool, etc.
You can buy fresh fruit and vegetables instead of highly-processed food. If you're American you can buy imported or certified organic meat instead of the hormone-filled shit on the shelves at grocery stores. You can spend less time working and more time cooking healthy, with no pressure to eat fast food because you're in a rush.
Money really does buy happiness.
I accompanied a family member in an ambulance recently and I had the ambulance rerouted to a private clinic. They needed a €25k payment guarantee but we were able to go into surgery within a day.
But then again, the list of things that statistically keeps you healthy while being expensive is actually very short (GLP-1s currently being the most notable item on it).
Supposedly this is going to change in the near to mid future with more wonder drugs incoming. But, for the time being, that's nice!
For example: societies that live the longest and are generally the healthiest do not have gym equipment or trainers, exercise is a core part of their every day life.
The mistake you are making [I think] is looking at these things as impossible goals because of lack of more money so it is easy not to try and risk failure.
If you're not wealthy you can do them, but you have to sacrifice other things, and some of those you wont be able to afford.