You can find commercial cleaning supplies at almost any restaurant supply company. Here is a good recommendation http://www.unoclean.com/Commercial-Kitchen-Food-Service-Cleaning-Chemicals.aspx.
There are quite a few places where you could get an inventory checklist for commercial cleaning supplies. A great place to start would be one of two websites: ehow.com about.com They both have basic list of supplies that you should have.
A friend of mine has been a customer of http://www.goodwinjanitorial.com/ for more years than I could remember. He always recommends that site to people who are looking for cheap commercial cleaning supplies.
You could start a commercial cleaning business by first getting all the supplies and your name out there. Advertising on Craigslist or Facebook would be a great start. Once you have a great customer base your business could really take off.
The decision to purchase new or used commercial kitchen supplies is a personal preference. If you want to be sure that all the supplies are in good working order, it may be best to purchase new. You might also check on warranties. However, if you would like to save money to invest elsewhere, purchasing used kitchen supplies could save a great deal of money. Just be sure you are dealing with reliable people.
Most commercial cleaning supplies are perfectly fine to use around babies as long as you never spray them directly at the baby or in his/her general area. ones that have ammonia in them should never be used around babies because they are inhaling a chemical that could potentially cause harm to them.
There are car organizers for organizing anything so it could work for cleaning supplies.
In my opinion the best place to get kitchen supplies and the most wide array of kitchen supplies can be found at Bed Bath and Beyond. This store specializes in things for the home and has almost everything you could need.
Commercial popcorn supplies can be purchased from many stores online. A few examples are www.epopcorn.com, www.snappypopcorn.com, and www.thepopcornmachine.com.
Cleaning services should follow the instructions from the manufacturers of the supplies on how to properly dispose of the supplies. It is important to follow the instructions because there could be environmental repercussions.
MSCDirect.com and bakedeco.com are two reliable commerical baking distributers and they both have a wide variety of supplies. You could also search on eBay or Craigslist as a lot of commercial bakeries could resell their supplies if they go out of business.
You could buy janitorial cleaning supplies at walmart. They offer plenty of disinfectants for exceptional prices. Also the products are built by great companies that are usually used by many.
There are probably plenty of local bakeries that you could purchase supplies from. If you wanted to buy from online you could try www.bakedeco.com/ or cooksdream.com