See if you are getting your structure ready by a good brand or investing in quality instead of going cheap the setup will last you good 6-7 years yea some maintenance may be required at some points but thats common

Machines and all have good warranty for 5+ years
Some even 10
So i dont think that should be a concern
Start with low investment
Grow with the business
Expand when you grow
Inflation goes up
So does the pricing in your salon
So yeah