Re: Business is slow
Agree with Mincer -You can get hyper regionalized advertising with Social Media now -they can use a group of permutations to target your customers . -like location tags and guitar/instrument related tags and likes.
Other than that, you have to improve word of mouth -find the best or known guitar players in you area (with bigger mouths or social media presence) and offer some discount or even free work. I mod some amps and build some pedals for some well known players on occasion, and get DMs and emails all the time from players wanting the same -especially when the player posts on social media and say something like "check out my new custom pedal or modded amp made by my friend ****" . -then the requests go nuts. -I've actually got a few people in Poland asking for pedal boards because of a post made from show in Warsaw in Feb.
And I don't do modding for a living (it's a red ocean), just in search of great tones with my friends - so someone doing professional guitar work really needs to be on the scene to beef up the roster -at the clubs and bars given out cards or social media info.
I'd also get to known every local and regional club, and get your cards in the clubs for tour emergencies (the doctor is in!)-they'll also let you in their shows free to work the crowd as a teamwork type of thing knowing your their go to fixer. That's what my buddy does, and he's had everyone from JMascis to Dweezil Zappa getting a quick repair when I was swinging by his shop all the time in 2017
Get out there and move the meter!
**edit** sorry . one more -Parents, you have to get word of mouth with newer players and their parents -maybe flyers at school music departments, social media to hit parents, and get flyers up in music related places like book, music, and coffee shops.