If you did, you cannot collect double rent. 

He collects cash down payment and finances the rest.

I have written a less sophisticated web crawler but for different purposes.

They are far better at tenant selection than the average landlord that screens a few people per year.Efficient Rent Collection & Enforcement: I spend a ridiculous amount of time answering questions from investors that have no idea how to handle late rent, unpaid rent, and other pay issues.

As a co-host for short term rentals, you may not need a license as long as you're not crossing over into activities that could be considered brokerage activities like handling any contracts, collecting rents, doing any accounting, approving tenants, etc.

If you are a REP and just collecting rental income there is no SE tax regardless if it is passive or not.

Quick math says you're collecting roughly $420/mo in cleaning fees.

We had to place the tests in every unit and then re-collect them a few days later. 

I've collected thousands in security deposit from my guests who've caused damage.

In my area, if you own an investment propert/non owner occupied, you need to add it to a separate registry and file with the municipality in order to legally collect rent and have backing in case of eviction.