An awful lot of landlords are loathe to return deposits.The charges presented look like routine charges for preparing a broom clean rental with normal wear and tear for the next tenant. 

My only advice would be to know your area well and routinely analyze properties so you know the potential values and are ready to move quickly when a deal appears. 

Is there a local REA group that meets routinely?

:-)  Lampasas has a lot of manufacturing jobs and they are routinely through they Economic Development council cutting sweet deals to ben more businesses coming to the area.  

They routinely underestimate repairs and overestimate ARV.

Doing routine tasks will stifle your creative powers. 

How many people are moving into and out of a particular area on a routine basis. 

I put in my leases that if the appliances stop working because of age or routine use I will fix or replace, but if there are signs of abuse it will be the tenant's responsibility.

Some days I was rushing home during my lunch break to clean the rental between guests (I routinely had guests checking out at 11:00 A.M. and guests checking in at 3:00 P.M. that same day). 

I would say your fee cost is in right range, I would also put that if you are kept from access to apartment for service a fee of 75.00 will be charge for blocking entry, so if you have a notice out you will be doing routine work or inspection and they haven't called to reschedule you given them a bill because you were denied entry and have to come back, it happens and it's a complete waste of time..