Quote from @Brett Riemensnider: Don't make it so complicated.

As not all your lists registered and accepted advertorial messages on your site...3) A colleague told me that auto blast sms campaign is illegal, you need to send manually to each one of them... how we do it when we talk about thousands daily ?

We were able to estimate out each unit but still had common area, exterior and some site work that was added to totals. 

I've had no luck on FB, but you can use property sites like PropStream (expensive) or PropWire (free)

You can visit my wholesale site via my website listed here on BP.

Am I able to sign up and just use it to adver across the 20+ sites you listed? 

Inflation- still have plenty of hard assets and development land sites, to ride any high inflation moves.Let me know if you recommend any changes/adds to the above action items. 

There's free content on their site.

Unless the booking comes from a direct booking site that is obviously legit, you NEVER EVER rent a place off the OTA!

Do you have experience using those sites?