Speaking from hands on experience on both platforms as I've worked with both Carrot and Wordpress sites (more than 400 sites so far since 2017), what carrot brings into the table is their simple, all in one, fast website platform.

Since you’re looking to own rentals (LTR & STR) and flip 1-2 properties per year, here’s how each entity type works:1) Sole Proprietorship – Simple but Risky✅ Pros: Easy to set up, no extra costs, simple tax filing.⚠ Cons: No liability protection—your personal assets are at risk if something goes wrong.✔ Best for: Beginners with just one rental and low exposure to risk.

I would second the simple spreadsheet.

Quote from @Loren Souers: A simple spreadsheet would suffice.

Really simple process to get a term sheet and no upfront fees except appraisal cost that is paid DIRECTLY to the appraisal company.

Personally, I would start simple with a single family. 

If you have ever learned something important by trial and error, then you can probably understand the frustration that you feel when you make a "rookie mistake" or a simple error that creates a big negative result.

And remember the REI Simple Program that you signed up for but didn’t use?

Speaking from hands on experience on both platforms as I've worked with both Carrot and Wordpress sites (more than 400 sites so far since 2017), what carrot brings into the table is their simple, all in one, fast website platform.

What I'm really looking for is a simple platform where my tenant can pay rent online rather than send in a physical check every month (their current system...).