The best advertising is "word of mouth" and "social media" hands down. Both free by the way.
People talk and when happy about your service, pricing, reliability, and honesty, they tell others. On the other hand, when they're not happy, they will tell even more others.
When first starting off, concentrate on an area, hit it with some flyers. Price jobs a little lower than average (But not too much,
because you step on other company's toes and keep prices at 1994 level, like they still are today in 2020, LOL).
Then absolutely do the best job you possibly can. Show up like clock work, follow up with customers. DO WHAT YOU SAY YOUR GONNA DO! Communicate, tell all your frinds and family, sell other services, offer neighbor discounts. I promise you, before you know it, you will be growing. Doesn't happen over night. Keep grinding and busting your arse!
My budget for advertising nowadays is purchasing company t-shirts and hoodies. $0 for any other advertising as has been for 15 plus years. Do it right, grow slowly, but steadily. Your success is up to you!!!