Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

I don't think finding an agent to advertise it as a "handyman special" on MLS will be fruitful.

because each time hit with realization of the BS, the whole game is rigged that it's not BS, it's just you havn't gotten to that other thing, that next level, that other access, and it keeps ya going layer after layer after fee after membership. 

Parking, access and more needs to be factored in. 

They have access to the data accurate data.

I am looking for a platform that is cost effective, but allows me to track all the essentials, give owners access, and ease of accounting.

Try TransUnion's or Zillow's service3) Figure out where you plan to advertise your rental rooms4) Research competition and "plagiarize" their ads5) Use that same research to set your rent

When advertising, the owner must include the maximum occupancy limit, parking information, minimum stay requirements, and other required information and statements.

If you're uncomfortable giving access to the unit for showings (after prescreening) use a Realtor for tenant placement.

Typically tenant placement is the first month of rent so 100 bucks seems a little on the low side, what are they doing to advertise your property that they are able to do it for only 100 bucks?