Here are some thoughts.....
1) The landlord may be responsible for and/or willing to make some of those modifications on your behalf before you move in. Hence, you wouldn't have to worry about your security deposit.
2) Discuss what you need to do with your landlord upfront and ask if it will have an effect on your security deposit.
3) Be prepared to remove such modification and and repair any damage caused by said modification before you move out.
Mitchell S. Feldman
Associate Broker/ Director of Sales
Madison Estates & Properties, Inc.
Office: (718) 645-1665/ Cell: (917) 805-0783