Use every free social media in your area. FB groups, CraigsList, NextDoor, etc.
I think that for a business like that, you don't want to come off as highly professional (ie high cost), so keep it casual.
Do you have a way of managing customers and collections? How will you manage the schedule of services?
If you use your car, track the miles used just for the biz for tax deduction. Can you designate an area in your home as the office of the biz for tax deduction?
Once you have positive cash flow, consider giving discounts for referrals. And repeat business - Get a free scoop after 5?