If I was not replacing the item with the same item, I would not charge the tenant, since there will not be an invoice to substantiate the charge.  

However, if you have a separate contract for the storage unit rental and it's not on the premises of the residential rental unit, then it may fall under storage unit rental laws.It's paramount that you invoice in a timely manner whenever a tenant owes you for something.

Send her the invoice for reasonable repairs with a payment plan option?

I'll let you know what I think.I use Quickbooks for invoicing rent, and the desktop version just increased ACH transfers from $1 to $3 per transaction. 

Photos and repairs by professionals with invoices and photos to support the work, and a date stamped photo set of the original condition are essential.  

Are all my invoices uploaded to my owner portal?

The one exception would be if they own an official company that you would have considered anyway - in this rare instance I would still require a formal quote, invoice and pay them like any other professional.Never take “favors” from your tenants.

Get the copy of his ID when he turns in the application (use your phone, lay the ID on the app to take the photo).Hopefully you are in a location where you can even evict - be sure you are adding his fees onto a monthly invoice, showing the running total past due.

Create an invoice (using items Security Deposit mapped to Security Deposit (liability account). b.

If you truly mean the best as the most expensive, invoices will be over $200,000.