Congratulations!!
This can easily happen to a competitive group of males as we just cannot be outdone!
Friend one buys a Dustbuster and brags about it.
Friend two buys a Dyson stick vac and brags about it.
Friend three buys a Kirby home care system and brags about it.
Friend four gets a central vac system and really brags about it.
You buy a vacuum shop and brag about it over all of them!

)
All joking aside, I wish you the best of luck in your new profession!
Do a great job, troubleshoot and not shotgun, keep costs competitive, and do the jobs right and thorough to avoid comebacks. Best of all, keep a friendly attitude, even when it is difficult. This makes all the difference.
Perhaps start a youtube channel where you document repairs on customer units to help DIYers, show your customers what you did and why, and to show them and potential customers how well you do your work. I know of a few places who do just this and they have more work than they can handle. These are places I would do business with if I lived nearby.
Keep us posted on how this ramps up!