One of our tenants with a substantial lease is a corporate dental chain that asked for 3 months free now with lease added 3 months in the end of lease at 8 years.

Since you are a contractor, you should be able to use your last two years taxes to substantiate income.

Further, 10% in a large deal may be a substantial portion of the GP's wealth.

I'm sure you want to sell to a cash buyer, but they will likely finance at some point and will need to take that expense into account.Management will likely be 10-12%, unless the buyer already has a substantial portfolio.Using your insurance and tax numbers this place would only cash flow ~$75/month after debt service.

The builder is running a promotion that provides a substantial upgrade credit. 

We're looking at a home that it more expensive than we'd typically think about, but if we sold our primary home and one of our rentals, we could pay it down substantially.  

They are custom, hickory, and quite substantial.  

If you're market is appreciating in a really substantial way and you don't foresee any issues, or if you see an opportunity for a great buy and quite a bit of forced appreciation, you can adjust your approach.

You can influence property care as a landlord through inspections and a lease. 

As alluded above, if you don't have reasonably substantial amount of reserves sitting aside to bail yourself out, you could be a in tricky spot.