Here are some of my findings which I hope might be useful written in a patronising form for the sake of speed
You won't be able to take a holiday for the first two years at least - and you won't want to.
You will need to keep expectations low and keep under the radar after launch whilst you learn how to run an agency.
You will really notice and appreciate the contributors putting in the time to help your project.
You won't be able to get behind test portfolios and their owners will be your most vocal critics.
You must have the full support of your immediate family, even if not directly involved they will have to make sacrifices too.
Above all you will need to enjoy your new job and you will only enjoy it if you can shape and control it - Ktools might not be up to the job in the longer term, that's just my opinion though.
I was up last night until 6AM due to someone in the southern hemisphere having a credit card issue which I needed to look into in case it turned out to be a wider site problem (which it wasn't thankfully & the customer got his image) - it will be your baby and you might have to skip sleep sometimes.
If no one here can talk you out of it then just do it, but I would consider writing your own code so you can deviate from the norm if you want to and when the time is right.
Good luck!