Aloha,Yes, it is fairly common to include a clause for major projects or other significant time-sucks such as Court related time, after hours Emergency services (major fire/flood), or even excessive hand-holding (limiting interactions/prolonged meetings with Owners for routine issues).

A small consultation fee is better than a large retainer and a prolonged situation which would see arbitration and possibly an appearance in front on a judge. 

Our experience has been that in cases where there has been prolonged smoking by the prior occupants, the only way to rid the most affected areas of the odour and harmful residues accumulated on exposed surfaces is to gut these parts of the property back to the studs.

If I were the Landlord, a neighbor of my rental property contacts me about these problems, I will fire the PM and evict the non compliant tenants who allowed prolonged damage. 

So I want to make sure, if we do buy this house, we're not backing ourselves into a mortgage we can't afford and prolonging our real estate investment career.I don't think we'd re-sell the house once we purchase, not immediately anyway. 

There are several new projects taking a prolonged amount of time to reach stabilization and we believe underlying vacancy for the entire market, to include smaller buildings, is higher.

. These things are prolonging the insurance process. Please take this into account when scheduling the closing process and plan for the process to take a few extra days.

Prolonging the repair and cutting deals is only going to cost you more $$ and cause more stress over the long run. 

Never know what might happen, especially as properties start sitting on the MLS for prolonged periods of time.

that way it prolongs the amount of time you will have to pay for something big.From day 1, after closing, collecting rents.