Ideally I'd like to avoid any language that would require extensive record keeping of hours or wages expended, though I will concede that's probably the most responsible solution.  

I need to know which issues are detrimental and whether or not I need to ask the seller to concede on anything.

Louis County, although the company’s CEO concedes the number is higher.Tax records indicate Raineth Housing is delinquent on at least 558 houses, with nearly 350 homes owing back taxes for three years.News 4 Investigates traveled to Los Angeles to ask Raineth’s CEO why his unpaid tax bill totals more than $1.1 million in St.

If I breach the contract I can be sued for broker costs (which at that cost I might as well complete the deal)I am considering writing a letter to the seller, explaining it was an honest mistake and that I'm willing to concede the deposit at the least.

This should be pretty easy to get broker to concede. 

I was starting to think I'd have to concede and ask for less rent.

I also recently had an employment change as I Conceded my 50% ownership share of a general contracting firm. 

You can get it paid to you like a normal commission, or concede it back into the deal for a better price if it's written in the offer that way.  

If they have this knowledge, then they may be less willing to concede since they will be in the superior negotiating position.  

@Michael Plaks, I concede and bow to my obviously much older colleague :)  Naps always!