I will definitely get an invoice either way so I have it for tax purposes. 

I still have 19 days before 30 days is up and the invoice for the work is coming today/tomorrow.

I have not used it yet, but am looking for a service to schedule invoices and send them to their email.Or here is a huge list of online invoicing services...http://smallbusinessbonfire.com/send-online-invoices

* Are all my invoices uploaded to my owner portal?

Enter a maintenance request, assign a vendor, attach a fake invoice.

Many PMC's actually hide their markups on maintenance by building into the hourly rate they charge for their maintenance workers, or by hiding actual contractor invoices and only sending you their invoices with their markup built in. 

This includes categorizing income and expenses, reconciling bank statements, and maintaining receipts and invoices.6.

I do not know what the cost is currently, as I don't pay those invoices, but I am sure they are still under $10 per person.

How are invoices tracked and verified against bids?

The client spent $25k on the remodel which included turning a carport into a 4th bedroom so basically we turned in the remodel invoice(s), before and after photos and some very similar recent comps we found more in the $90-100k range.