I do hope the PM sorts this out himself, but it is worrying when I receive a letter addressed to me that is directly accusing me of discriminatory practices.

You might get a general idea if you look at the online county property lines (GIS) and see if you can tell where the tree is and the part that is down.

Can't see to find one online, and my listing broker doesn't seem to have on on their site either despite having other forms.

Partners normally are not considered employees.Its normally good practice to have things in writing 

Things are very different in person then they seem online, x100 for someone from CA going to say the midwest.

You'll be able to find out how much a bank liened when the property was sold and you could probably estimate monthly payments since then- just use an online amortization calculator.

Do you go to a physical auction or buy online from sites such as auction.com?

I typically spend up to 20% of my commissions on lead generation online and off.

Show separately for 2017 and the 3 preceding years: gross sales, cost of goods sold, gross profit, percentage of gross profit to gross sales, amounts collected, and gross profit on amounts collected.It seems, after reading this, that your solution would be the correct one - enter the gross profit for each year on Line 1 of Schedule C with a separate statement attached to the return describing the installment sale and how you arrived at the gross profit. 

A contract binds you to meet it's obligations it does not bind you  to assert it's rights.Forgoing of a contractual right is a time honoured widespread business practice.