There are typically 3-4 types of advisers/planners.
Work at a bank - salary and reduced commissions if any
A place like Edward Jones, Merrill Lynch, etc - starting salary for 2-3 years and commissions capped at usually 40% or so
There are places like TD Ameritrade or Fidelity, working in house for them but I don't know much about that.
Lastly you can be independent - no salary but 100% commission ( your actually commissions usually cap at 80-85% )
They all have pro's and con's....in my experience each one will match with your personality and how ambitious you are.
The only one that allows you to be twin career and start part time is to be independent. The good thing is you can start slowly, the bad part is it takes time to build up income. The way the industry is going is most money management will be fee based going forward. To keep things simple if you are managing $1 million in assets after year one, charging an average of 1%, you'll gross $10,000 and if you are at 60% commission you'll net $6000. That isn't much to live on but the beauty of the industry is you maintain those clients/assets and continue to get paid each year. After 10 years if you're managing $30 million that's $300,000 gross each year....you get the picture. You can sell term insurance and financial plans to help supplement income as well but they're more icing on the cake. The majority of income comes from managing assets.
It's hard to get started because it takes a few years to build up assets and produce an income. A saying in the field goes like this " You're underpaid the first 3 years, paid what you're worth the next 3 and overpaid the rest of your life". Maintaining the licenses and insurance isn't cheap ( $3-$4k a year ), offices, supplies, lead generation, etc etc. I think it's one of the best careers out there, you don't need a degree, licenses are key. There will be a lot of advisers leaving the field over the next 2 years, the average age of advisers is late 50's i believe and over the next 20 years there will be the greatest transfer of wealth we have ever seen. Great time to get started if you have the drive.