Tellus has multi-user support so I can add my spouse or parents as co-owners or managers.

I own 2 cabins in north Georgia and co-host 3. https://freedomfindervacationrentals.com

I am in Colorado.

For single family homes it is hard to get cash flow in CO unless doing Co-Living or STR.

I am looking into purchasing more properties, and want to have some kind of Holdings Co where the taxable income flows through so I can tax advantage of the corporate tax rate.2.

Only if it's an individual condo you're renting or a co-op.

For me when I'm estimating rental income I start by looking at the area for active listings <40 days old with similar characteristics to the home you're looking at purchasing (trying to find same bed/bath count, and same amenities like in CO homes with a fenced yard do very well because everyone has a dog).

You can get co-host as low as 15% and PM as low as 18%.  

I will soon be a licensed broker, but need to work under an employing broker for two years per Colorado law.

Are you looking to put someone else (partner/family) as co-signer on the financing side?