Secondly, for larger jobs where multiple estimates is not just a nice-to-have, but required: is it PM's job to look for these estimates and provide invoices? 

Document it because that costs nothing other than some time.I'd clean it up, invoice the repairs/damages (so you can charge the security deposit), and complete any turnover renovations or fixes and find a new tenant.I have not had to deal with such a situation, however, so my advice may not be best

So dang it BE serious, get someone that knows what they are doing (as long as you know you CAN do it yourself)*Drops mic*

at your cost.Send in professional cleaners (with pictures before and after) get an invoice from cleaners and pay that room security deposit. 

I've heard of cashapp, venmo, paypal, Plastiq paired with invoices or using with a payroll service.

In Seattle, I rent because I can find cheaper rentals in the urban location I desire, and it's so dang expensive to buy a home right where I want to live in Seattle.

They also put all of your properties on one invoice for tracking, even if you own them under different entities. 

Next question, how do you edit a post do fix your dang typos?

You will then submit invoices to the bank and they will deposit that money into your account so you can pay people.

We use Mandrill but it's for forgot password, invoices, receipts, task reminders, notifications, etc...We weren't able to find a solution for this either, so we had to develop our own software and integrated our gmail account for sending day to day emails but we are using Google Apps for business, so emails are coming from our own domain name.