If the booking happened however they said that since the inquiry was made through their platform they said that they will charge 10% because they "advertise" it. 

Other than the costs of setting up the STR PM business itself, there are relatively few costs to the PM for taking on a new property.An MTR operator is usually approaching LTR owner with a proposal: to rent their unit at the advertised rate as a long-term tenant.

These will allow you to advertise in an area where viewers are actually looking for a new home or apartment.2) boost your listing with a small daily budget.

Otherwise, as others have said you’re basically advertising you don’t plan to close. 

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.

And it is so stupid to not advertise every way and time possible, right?

RJ Gullo advertises everywhere about 1031 exchanges - I've never used him, but I know he does them.From what I understand about what you said it looks like you are trying to do an installment sale (downpayment now, then payments overtime).

Instead of spreading yourself thin, focus on a few high-authority backlinks that can make a bigger impact.For those looking to accelerate traffic through another route, PBB SEO services offer contextual advertising to help you quickly launch and scale ad campaigns, which can complement your organic SEO efforts.

I don't do anything with advertising on campus.

Other small things I do besides leasing, mangement, some maintenance, are installing keypads to doors, programming gate remotes, garage remotes, doing walk throughs, doing walk through videos (15-20 mins move in/move out videos), advertising videos, take care of our website, our portal, fix the gates and cameras when they go out, just like everything you can think of.