I’ve noticed people that don’t care about their credit don’t care about a lease.  

“A licensed real estate salesperson may obtain an additional real estate salesperson license and become affiliated with an additional licensed real estate broker as a real estate salesperson, if the salesperson: (1) obtains, from an additional licensed real estate broker, a commitment providing that the salesperson shall become affiliated with the broker as a real estate salesperson on the granting of an additional real estate salesperson license to the salesperson; (2) gives each real estate broker with whom the salesperson currently is affiliated written notice that the salesperson intends to affiliate with an additional real estate broker; and (3) complies with the application procedures under subsection (j) of this section.”

You're basically hoping the bank doesn't notice and call your loan (Which is totally in their rights to do). 

Notice and why its condemned is posted on the house. 

If it is allowed deduct the fee from their rent payment and issue a notice.

Specifics:Duplex, bought/rehabbed for $210K ($60K of our own money)  We owe roughly $150K.ARV: $265KInterest rate on current loan: 4.875%Current Mortage/Taxes/Insurance: $1,100/moCurrent Rent: $1,200/mo each side ($2,400 gross/mo)Cashflow: $600/moWe have spoken with two credit unions (and will look into more) and here is what the numbers look like.Lender 1: Will lend 70% LTVClosing Costs (Not including an appraisal): $6,900Interest Rate: 5.75%New Mortgage/Taxes/Insurance: Roughly $1,450Cash Out Refi would be roughly $28,600New Cashflow: Roughly $250/moMoney into deal after refi: $31,400Lender 2: Will lend 75% LTVClosing Costs (Not including an appraisal): $7,000Interest Rate: 6.25%New Mortgage/Taxes/Insurance: Roughly $1,600Cash Out Refi would be roughly: $41,700New Cashflow: Roughly $100/moMoney into deal after refi: $18,250We don't necessarily need the refi money to do another deal or two this year but it would obviously help although it would decrease (I think) the amount of money lenders would be willing to give.Does it make sense to refi even though we won't get close to all of our money out of that first deal, have a much higher interest rate and decrease cashflow by over 50% or would it make sense to keep our money in that deal with the much better rate and not refinance? 

Like @Mary Mitchell my vacancy rate in Brooklyn, NYC, is effectively ZERO.I have been owning rentals for 21 years, currently have almost 30 apts with about 70 tenants.I estimate that I probably lost around 5 months of actual rent in all of these years.The vacancy rates are so low, it is SUB-4%.Normally, I will get a 45 day notice from the tenant leaving.

Find out what notice is required for changes in a lease.

When I look at properties at Auction.com, I notice there is a good investing opportunity, however most of the times you cannot look the inside of property.

The turn was minimal and a new tenant was placed in the same month as the previous one vacated).As much as we’d like to continue managing your property we feel it is best to allow this to be your 30 day notice.