What specific websites will they advertise your vacant property on?

One thing you might think of doing is having and promoting your own website to avoid the exhorbitant fees charged by the third party sites such as Expedia, Booking.com and Air BnB.  

But consumers all are on the site for free where real estate agents are constantly hawked to buy leads or participate in what is now a 35-40% referral business for unvetted leads who think they are contacting the listing agent.Their business model has always been flawed.

In my opinion, making an offer site unseen is not a risk.

The process for commercial properties is basically the same as residential properties, so it takes work.Again, echoing Dominic, a good investment is a good investment, whether you spent 8 months courting an owner to get them to sell to you, or whether it is on CBRE/Cushman/Marcus/Loopnet or any other brokerage website.  

Ok, I wasn't spamming (I don't even sell anything I could spam) but I was pasting a "hi" message to new members THE SITE RECOMMENDED TO ME.

Their newsletter/website/social media has all the vendor recommendations for our area.

Check out their website at https://austinrenc.com/We used the REIGs in our areas when we got started and they were exceptional resources and places to make contacts.Good luck!

Another way is to check out this website.

Do you have go-to websites, podcasts, or groups you follow?