I wouldn't recommend collecting rent through Zelle, you should use a property management software that allows this.

Let's just imagine a scenario where you only have one property, and you don't use any PMSs or apps like Turno, for example.Cleaning and maintenance: 4 hours per weekRestocking supplies: 1 hour per weekResponding to inquiries and bookings: 2 hours per weekHandling guest concerns during stays: 1 hour per weekCreating and updating listings: 1 hour per weekManaging pricing: 1 hour per weekFinances and taxes: 2 hours per monthInspections and minor improvements: 4 hours per monthTotal estimated time per week: 12 hours, more or lessTotal estimated time per month: 26 hours, more or lessIf you do use pieces of software to automate your work, it can be even less.

I'd recommend getting familiar with the software Propstream - has tons of great owner information that you can use to narrow down to sellers who may be more motivated rather than just calling any house off of the street.

I'm a software engineer looking to get into real estate investing.

The risk is high that they will be recategorized by the IRS upon audit or examination, which means that you've overcontributed to a retirement plan. 

Education and research hours, "managing the property manager" all have failed under audit historically.There is a lot more nuance here I could go into, but I would strongly advice you talk with a real estate-focused tax professional.

The software and UI are super easy, great for screening tenants and keeping track of everything. 

For example if a licensed brokerage is audited by the state and they cannot furnish buyer broker agreements for active clients the division could fine heavily the brokerage or remove their license.

I was wondering if anybody had any recommendations regarding the various analytical software available in the market, such as AirDNA, Host Away, Key data, etc. 

This would only ever come up in a formal IRS audit, but the regulators don't like 1031 properties that are purchased below market value or rented below market value.