If there is a bid discrepancy like that I will call the seller and discuss it with them and bid off of my value.

Are my assumptions below correct?

I was going to finish caulking a bathroom that wasn’t caulked correctly, and so I was cleaning along the edges of the plastic insert of the shower, and noticed chunks of black stuff kept falling.

Is that correct @George Blower?

I would need to see pics and detailed bid for rehab to get a better idea, but 60k does not go far on a 10 unit. 

I had to deposit 2500 per property that I wanted to bid on.

Your inspector seems to be correct.

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. 

If my 3 bids come back higher then we will have to negotiate down dollar for dollar to cover.

It's not technically correct, but close enough if you're doing it yourself.