What systems and apps are a must for a newbie investor?

Most of my accounts are within a quarter mile of each other and where my office & home are, so it's very easy to work them in, go and talk to folks, etc.I've also had accounts that are at places just one city over and it was a perpetual thorn in my side since it wasn't in my main sphere of location/activity.Once you find some that are recommended and fairly close by / convenient, some other things to check out are fees and online access, bill pay, etc.For example, I found out that one of my banks doesn't let me do mobile deposit through their app for a business account - so that was quite a disappointment.And if you might have several accounts, one for each entity, someday then fees across multiple accounts can add up quickly so keep that in mind.

He showed vacant units to prospective tenants and take the credit app. 

One is the app fee and cost of credit report. 

I'd be happy to chat as well, my cell is (704) 706-4548 feel free to text, I respond to that best. 

Cell phone expense, website, advertising, cutting the lawn, electric, snow removal (depending on where you are), pest control, lawn insect control, cleaning after students move out, any software costs for lead generation, tenants payments, online lease generation, etc.... plus how old is the property ($1,700 per yr is low if it's an older property). 

Do your tenants like the app and have a positive experience or is it difficult for them to signup and use?

If none of the methods that @Kyle J. laid out for you work, you can also try out a skip tracing app.

See if the tenant will allow tours with 24-hour notice.Don't know IA, but in any market, the competition for "good" tenants is fierce so you want a lot of apps.

However calling another agents client is like a prosecutor showing up at the jail cell of a "suspected" criminal and ignoring their right to counsel while "pushing their offer" after a defendant has stated a "desire of counsel to be present during negotiations".