The best description I have seen for single store franchisees is, you’ve paid a lot to give yourself a job. They are not lucrative, and in fact, are capital intensive, and often predatory.
There is a very high up front cost, and you generally do not own the real estate. This means you are locked into 30 year leases, often with complicated terms that are solely beneficial to the land owner.
Next, with regards to liquidity, if you don’t own the real estate, you often can’t get multiple business loans with a single franchise, so you must secure the loan with your personal assets, which means you will go personally bankrupt if you hit a rough patch.
Then, after dealing with the complicated business to business transactions and legal work, you still have to deal with the corporate bullshit, taxes, and supervisory duties, particularly if you do not already have a strong business partner to do this for you.
Pretty much, unless you are independently wealthy, own the real estate in a high traffic location, or already have multiple other franchises, it’s a losing venture that will kill your soul and eat every dollar you have.