Ryk, if all you're missing are a few squeegees and some other minute tools...... that sounds too silly to be worried about putting some system into effect to track down a few dollars. Your people will waste more time, filling sh!t out then you'd lose to begin with. Just have all your tools cataloged and numbered and have people
sign out when taking them and
sign back in when returning. As for scheduling, for 8 people, all ya need is a white board with the jobs, who is assigned which job and do the same thing as you do with the tools. Also, a daily morning meeting for maybe 15 minutes will help deter some of the empty-headed ways of your present system.
Make people responsible for themselves. Employees are paid for their bodies, mind, arms and legs. If they have trouble doing their job, then have them write it down and
sign/date it all. There is no honor system if I foot all the bills and the employees are scatter-brains.