It's a full property management lifecycle platform, so it does a lot more than just collect rent electronically. 

Got a lower-mileage, somewhat older (but all electronic) F150 for $700 with a collapsed front-end

While the Zestimate is presented in huge, bold lettering, you'll need an electron microscope to find the link to their disclaimers.Here in the Boston market, Zillow claims to be within 10% of the sale price 79.3% of the time. 

The electronic locks sound like a good idea.

Except of course if there's already too many hair salons, or everyone starts preferring long messy hair styles, or your state legislatures impose a $10 per haircut tax, or we realize that electronic clippers actually cause cancer.Relative to doing nothing with you money, real estate is likely going to always be a "good investment". 

I currently have 75 properties and can’t decide whether Buildium, AppFolio , Rentec or some other platform is best for me I want to be able to collect rent , manage maintenance, communicate with tenants and vendors , manage accounting and electronically file documents.

That being said, our highest-priced real estate is along the coast, and I have some investors who do very well with Class-A properties on our barrier islands, such as St Pete Beach. 

I've given away so many hours to aerospace electronics, as a firefighter, drafter, project manager/estimator.

I also have electronic lock boxes and can grant a temporary pass code for the lockbox that would grant the vendor access if the tenant is away (usually they are at work when the vendor would be able to go in) but then the code will be deleted shortly afterwards - since I put this post up I have been looking into that and think it could work granted I would need to provide the necessary notification. 

Ryan Nichols an attorney in SC posted this.For purposes of this Act, "'[c]ommerical solicitation'" means contact by telephone, mail, or electronic mail for the purpose of selling or marketing a consumer product or service. ... ."