I doubt it was mentioned prior to you training and buying kit , but mick is correct the market is indeed saturated and rates are dropping faster than a tarts knickers , so many have joined and fuelled the race to the bottom and its a race that when won everyone has lost.
following a short basic training course you have the very basics only , it will take years to gain competence , some achieve this quicker than others , it all depends what you put into it , i advise plenty of bench practice and time in the scrap yards and on old bangers to gain experience and confidence , this is still the best way to learn .
research your area very well , learn who your competitors are , what the local rates are and the most common jobs you are likely to see , more affluent areas will see alot more high end and newer models where as less affluent areas will see older and less high end vehicles . this then gives you an idea of how many competitors you actually have , what the rates are locally and what cars your likely to see most of which guides your software and stock buying needs, all research that ideally should have been done and a business plan made prior to training and buying kit , you would at least know if viable before parting with a large sum of money.
i dont envy you , as i would hate to be starting out now , despite the job being easier due to equipment doing more and being more reliable , dependent on what equiptment you have . the one thing i can guarantee you is that what ever kit you have bought , it wont be enough , you will quickly learn you need far more , that is the one constant in this trade , it changes so quickly and is expensive to keep up and maximise coverage. it is an expensive trade where kit and costs have doubled yet rates have in some areas halved which is a huge inbalance .
the best advice i can give is do alot of research , alot of reading online , alot of bench practice and as much time playing with scrap cars as you can get .
form a business plan , work out your costs per job well to include business running costs , wage , taxes , parts, tokens etc , add a percentage for ongoing investment and work out what you need to charge to survive and grow , you can then at least ensure your not on road to destruction .
as mick has said , dont neglect insurance , liability and indemnity insurance that actually covers you to work on cars at the roadside , also your own vehicle insurance ensure your covered for business use and also that you are covered when working on a car on the public highway , as you will have keys and be running a car on the highway when working on it , so need to be insured for that car 3rd party at least.
dont neglect stock , most who ring you once advertising with lost keys will want someone today , if you cant do it today there will be someone else that can locally , so stock is essential , which comes back to research as you will have an idea of the most common stock you need for the area you are working in .
i wish you the best of luck , it is an interesting and great trade , you will get out what you put in to learn , its expensive , unforgiving and you will see rates drop as more and more set up , less jobs as more and more can be cloned , but if you survive and establish yourself , then you will enjoy it .
but you are very much on your own , you learn what you get stuck in and learn , you learn from getting in the brown stuff and figuring your way out of it and learn from it , but in reality your on your own , especially when the shit hits the fan .
im sorry if not what you want to hear , buts its accurate so useful , you will get help on the forum if stuck on things or with questions as a helpful forum , so welcome to the forum , read and enjoy .
please dont take it the wrong way , but the last thing the trade needs is more part timers , all it achieves is to kill trade for those that do it full time for a living .