Take a look at the video below:
https://www.youtube.com/watch?v=WJk9Skxyi84
It's all about succeeding as a pilot in the US but it's honest and a lot of its content rings true across other continents.
If you want to go ahead and train commercially, it's a huge gamble and as with any other gamble you should never bet what you can't afford to lose so please do not get tied up to your eyeballs in debt especially if you have to use your (or someone else's) property as security.
If you can train part time while keeping a stable income from a job or business venture then do so.
If you decide to quit your current career and train full time then don't slam the door on the way out, if you cannot find well paid flying employment after training you may well need to go back to your old line of work to keep cash coming in while you hunt for a flying job.
If you have a long term partner, spouse and or kids make sure that they are provided for and that you have their support to embark on training.
Good Luck and Happy New Year