Do any of you have experience with this kind of situation or simply advice?

Kindly, tell them you aren't going to be able to make it over to the property until tomorrow evening as agrees upon.

what kind of loan are you getting where you only have to put down $500?

Ask around for references for attorneys who do this kind of work, get 2 or 3 and call each of them for a price.

More recently I've been looking for kind of a "mentor" to give me some tips and tricks about the world or investing.

Not worth filing a complaint unless you can prove the many assumptions that you're making (that your offer was the first one, that your offer is more competitive than any other offer that was received (not just in price but in all offer terms), that the owner is getting some kind of "kickback" for going with another offer over yours).

Not a huge deal but something to be aware of, as other Chicago people like @Ryan Steele were kind enough to point out to me when I got started on this site.Otherwise, enjoy the BP community and I am looking forward to hearing about your successes over the months and years.John

All kinds of things to consider here...

I have been ignoring him because I am kind of scared of the unknown since currently I use HML and personal funds for financing.

I feel like I need to get some kind of written agreement?