They don't ask for any documents just do a credit check and you fill out their application.

These platforms typically have billing policies where you pay a per unit fee per month to the software and you get regular updates and support each month.There are a number of low-cost platforms available that are able to offer you a lower price by passing along some of the costs to your tenants (payment processing fees, applications, tenant screening, etc).

We just fixed up the house and have it on zillow with several applications in 24 hours. 

The $7K limit is on IRA contributions.

They offer credit, background, and eviction reports and make the process easy for both landlords and applicants.

Everyone completes an application...don't you want to know who will be occupying your property? 

If you are self-employed with no full-time employees you may wish to consider opening a Solo 401k instead of a self-directed IRA as it has several advantages over an IRA LLC such as much higher contribution limits, direct checkbook control (i.e. no need to have the account at a speciality trust company), ability to take a 401k loan, exclusion from unrelated debt finance income tax with respect to investment in real estate acquired with non-recourse financing, etc.Can I contribute to both a Solo 401k and SDIRA?

Then do a thorough research on tenant applicants (note: leaving this to a PM may be hazardous to your financial health) and choose the one that is most “stable” with the best potential for long term tenancy.This advice is contrary to maximization of rental income, but IMO will reduce expenses of tenant turnover, property damage, property management fees so much that the difference in bottom line income will be quite small.  

That loan is being paid off by someone who checks the box on the conventional loan application that they will be occupying the property.

I don't understand if I count since I'm living in the property or if it's only the tenants that count towards the limit of individuals that are unrelated living together.