Making 200 calls per person a day or more with a multi phone line dialer.   

I take care of the paperwork, finances, accounting, paying bills, finding tenants, creating the leases, interviewing tenants by phone/zoom, etc.

I can’t seem to get someone on the phone that knows anything and none of my issues get resolved anymore (I created a new listing for a new property, they forgot to add taxes and insurance, I have had issues reviewing guests and a host of other things).

That means picking up the phone and talking to them.

You can listen to Shawn Terry's podcast to get the idea of how to do things and Michael Quarles podcast have live phone calls you can listen to that are very helpful.  

Is there a recommended option for washer/dryer that doesn't require coins/bills but instead takes phone pay or a card, so that both tenants and prop managers don't have to deal with coins and bills?

Management can literally be done remotely with access to a computer and a cell phone......We have 49 large units being built and they have 12 month leases and we anticipate them to be fully occupied quickly.

It includes everything you'd need to start texting (phone lines, unlimited texting, unlimited calling, unlimited users, follow ups etc) without paying for each part on a subscription. 

They are not cheap and obviously require some kind of cellular plan, but I was able to get them to work using Mint mobile (you need a phone to activate the sim card on first, like an old iphone) Ive had 3 of these up watching a property in Cleveland, OH for well over a year, and Ive only had one issue where I needed to go check on the camera itself, (the plug for the solar panel came disconnected and just needed plugged back in) This camera in particular is nice because its actually 2 lenses that capture the full 180 degrees, so one cellular plan for "2" cameras.

I asked preferred vendor but lady on phone said you can use anyone available.