Start looking at finance options the minute you decide you want to buy a Franchise business.
If you are currently employed, I would look at establishing lines of credit with my Bank on property/assets that you own before resigning your position.
Get advice from a Financial Advisor or an Accountant on much money you can borrow on your current assets.
Once you know how much money you can access then you can decide on which Franchise system you can afford to buy.
It can be just heartbreaking after spending a lot of time researching the market to find the business that is right for you only to then find out from the Bank that it is way out of your price range and you can’t fund the acquisition.