Meetup.com is a good resource for those but some of the groups will also post here on Bigger Pockets Marketplace too.

The designated responsible party must be available on-site to address any issues as soon as one (1) hour following notification from an occupant, a city official, a code compliance officer, or law enforcement officer.Prior to the city issuing a certificate of registration, the vacation rental is subject to inspection to ensure compliance with: (1) minimum safety requirements under section 34.5-12; (2) minimum information requirements under section 34.5-13; and (3) to confirm compliance with Chapter 34.5 generally as well as any other applicable provisions of the Sarasota City Code and Zoning Code.The minimum safety requirements are set forth in section 34.5-12 and include compliance with the Residential Swimming Pool Safety Act, operation of smoke and carbon monoxide detection systems, and installation of fire extinguishers.The minimum informational requirements are set forth in section 34.5-13 and include, among other things, providing: (1) the location of the nearest hospital; (2) the non-emergency police telephone number; (3) the dates and approximate times of trash and recycling pick up; (4) the street address of the vacation rental; (5) the name and phone number of the designated responsible party or parties; and (6) emergency evacuation instructions.

It is a little more complicated than recommending zip codes to invest in since Detroit is a very block by block marketplace.

Quote from @Jacob Sherman: Would have to call and order an official payoff from the lender  After detective work I now found who has the loan/lien on my house.ReadyCap Lending.   

Not all but many scammers like to be GHOSTS providing minimal information as possible to engage a consumer in the marketplace. 

build don't' buy. 43203, 43205, 43206, 43207, 43223, 43222. new construction is selling at a premium by 30% to existing inventory, land is in better locations. infill lots for single family or 3 family is what we do I have a million posts in the marketplace about it. most of those are adjacent downtown zip codes in columbus where there is existing inventory. 

Meetup.com is a good resource for those but some of the groups will also post here on Bigger Pockets Marketplace too.

Aside of the MLS, properties are marketed on google (Adwords), FB Marketplace and PPC, Facebook groups and IG ads.

Background Checks - https://www.tenantbackgroundsearch.com/Apartment Listing - Websites I utilize: facebook marketplace, zillow, apartments.com, Padsplit (if you're renting by the room)

Meetup.com is a good resource for those but some of the groups will also post here on Bigger Pockets Marketplace too.