Budgeting is an integral part of society. Things like getting paid on time from parents, writing solid policies & contracts, marketing your business to new potential clients, obtaining the right insurance policy, understanding record-keeping and how it affects your taxes, and overall, just getting started in a manner that will optimize success.
Understanding where you are today, what tools you have to work with, what your goals are, and how you can best achieve them and measure your success, will help you stay on target and not waste what few hours you may be investing in your business at start-up.
The equipment is relatively cheap to get started and you can even line up your first customers before you even have the equipment since it is not time sensitive like lawn cutting is. You can line up customers first, get your equipment and get your money back right away.