Owning a coin-operated Laundromat is a great business and can be very profitable. But, unless you have all new equipment, it can quickly nickel and dime you into making a loss and going out of business, losing your investment.
The skills needed to run and maintain a laundromat are not rocket science and don't need expensive equipment: just common sense and logic.
I will assume you have no previous experience in repairing washers, dryers, change machines, etc. I will get you started on a journey to taking charge of your equipment. You will get great satisfaction in making common repairs and keeping your equipment working and earning you money.
I do not have any problem paying for repair parts. That is the cost of doing business. What I want to avoid is the $95 service call to troubleshoot a problem by my local appliance repair company, then the part cost being doubled as their mark up and a second $95 service call to install the newly inflated part.
Even if you only make one repair, you will save 10 times the cost of this book.