Hey @Jerryll Noorden - it really depends on what you are trying to achieve as there are so many options, the platform also changes quite rapidly.I have eight years of experience with facebook ads and marketing message me if you still need help with this.  

Of course, not every seller is looking for this kind of deal, some of them want the instant cash or might want a huge downpayment first.The episode #344 is actually dedicated to seller financing!

BiggerPockets is an excellent platform to utilize so I would recommend using the 'keyword alerts' function, 'search' function and lastly, stay active on the forums!

These platforms will bring up comps for both single-family and multi-family properties (apartments).

I would probably say that unless you wanted to throw that at the wall and see if it sticks on, say, PeerStreet or some other "crowdfunding platform", you might should just use that money for buying books, maybe going to conferences.

I need to start really dedicating some time going to local meetups and really trying to learn about partnerships in RE.

The big caveat would be if you have a management partner (like 50/50) who is fully dedicated.

They claim to be a low cost REI platform for beginners with 8-12% historical annual returns. https://fundrise.com/

But Cozy is good if you want to run your rentals like business kept track of everything (income and expense) on one platform.

They'll know that you aren't dedicated to them, so they will similarly not be dedicated to you.