The most common one is that when we get a new lease signed we are not getting the rent roll populated. 

Common fees will include a set-up fee, a leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

Is it abbreviated?

@Navjeet Singh it sounds like you're making a big mistake and you used a very shady agent (unfortunately it is common in this industry.

Is this common practice to close a deal? 

I hope we all have enough common sense to know there is always going to be some outlier market's divergent to the negative or positive given market specific factors.

Some contracts will restrict the liability to just the guarantor's share or another amount (say 120% of the guarantor's share), but this is less common.

If you have a small multifamily (let’s say 4-family apartment) that has a main common entry door into the building, are you supposed to change the lock whenever any tenant moves and then give all the tenants the new key?

Regarding the mortgage terms, you could either get a flexible loan (not very common) or a 5 year fixed mortgage to reduce the penalty (Vorfälligkeitsentschädigung) when selling the property before the loan ends.

None of us like ultimatums or, "take it or leave it" offers either.It's better to offer them 2-3 options where you "win" no matter which they choose.Another great technique is to ask them an open-ended question(s) that gets them to see the challenge from your point of view.So, let's apply these to their requests:1) This is more common than you'd think.