I'm not a lawyer, no legal advice, but if it says "in accordance with terms provided by Owner," and it's not in accordance with terms you provided them, then I'd think you shouldn't have to accept it. 

Some investors prioritize rapid growth and are willing to accept higher mortgage payments intially, while others prefer to make cash flow king and opt for smaller loans to mitigate risk.

I found it through a wholesaler, created a relationship and he accepted our offer How did you finance this deal?

As of the date of this Agreement, Landlord warrants that the Property sewage drains are in good working order and that they will accept the normal household waste for which they were designed.

How often / mainstream does this type of transaction occur?

You need one or the other, preferably both.Since you don't have any money, you'll need to focus on knowledge.Besides building your network, you can also start looking at properties to find market inefficiencies you can flip to an investor with funds for a fee.Wholesaling is the most common form of this, but you can do this in several different ways.Also, what happened if you found a "tired landlord" and got them to accept your offer of 0% down, but $x/month payment to take their problem off their hands via seller financing?

@Dave Foster @Dylan Johnson Hypothetically, they would send Form 8828-B for withholding certificate on the same day the property is under contract (with closing 90 days after acceptance to give IRS enough time to process).

Avail is more limited to the tenant experience side of things such as creating lease agreements and accepting rent payments and deposits.

Now let's say the offer is accepted. 

We've all accepted that there's a shortage of housing all across the US.