Most PM's here charge 15-20%, most are 20, but will depend on what services they offer.

I warn them that a cancellation - for any reason - will result in charges.

A good tax professional can save you more than they charge you. 

They should have also gotten approval from you before charging and doing repairs.

It is much faster than sanding. 

They’re built for heavy use and have faster drying times—usually 30–45 minutes—without needing major electrical changes.If you’re up for a bigger investment, adding extra stackable units in the garage could be a great long-term fix, though it’ll mean some electrical work and setting up proper ventilation.I’d probably go for the commercial upgrade in your current space first—it’s quicker and might solve the bottleneck right away.

Quote from @Chris Seveney: Quote from @Devin James: In 2021, we saw buyers upgrading to larger homes, taking advantage of 3% interest rates to afford an extra 300+ square feet.Today, smaller homes are selling much faster as higher rates make additional square footage less affordable.While rates are historically average, I don’t see them dropping significantly.

I have yet to have one late charge added to a tenant.   

Nothing changes behavior faster than, “Oh, you broke the rules?

They should be proactively communicating with you as to why they can't find a tenant and discussing options with you.PM's do get busy, so before firing them, try to have an open conversation to find out why it took so long and what can be done to rent faster in the future.