This also leads owners to ASSUME simpler is better when it comes to management contracts.

Keeps costs low and guests satisfied!

Most property management apps are built for LTR or STR.

Going direct saves you and the seller money, giving you a lower cost to entry which helps all your numbers, but you have to put in the extra work to find that deal.

2 or 3 bedroom properties would be more profitable considering their cost?

They are even working on getting me the evicted tenant's security deposit, the missing JANUARY rent since the place is still empty, and covering the cost of my own manager re-listing the property.

You need to know what things cost.

I'm surprised you can find a manager for 15%.

Same property listed water bill paid by landlord so how much does it cost to put individual meters for each property so cost can be moved to tenants? 

Here is an example of what it costs you to avoid professional advice.