You will need to determine the level you participate in your investment as well it makes a big difference. 

There are really great REI opportunities in different markets - markets in the Midwest and Southeast of the country are particularly lucrative - where not only are the purchase prices reasonable for most RE investors, but the homes are turnkey (new builds or completely rehabbed homes, tenant ready, systems 10 years of life remaining on them, property management teams in place) with appreciating home value AND appreciating rent.

You've likely used tons of different CRMs coming from sales, and HubSpot looks and feels the part.

I currently own 4 rentals in different states and looking to buy more.

You could probably just go buy a different investment property and achieve the same returns.

Is the service much different since Cozy merged with apartments.com?

Other loans might be a little bit different.

When investing in high cash-flow markets, I always recommend working with an investor friendly agent so you're able to gain the right insight on the different areas and the risks involved.

If there is no difference between Carrot and WordPress when it comes to SEO and ranking on GOOGLE then it might make sense to go with WordPress for a long-term play. 

In doing so, bear in mind that the cost and admin of a corporation is higher and that the tax treatment is different:1.