Quote from @Dennis McNeely: In a sandwich lease option, the investor exercises their option with the property owner to purchase the property when the tenant-buyer indicates they're ready to exercise their option and purchases the property.

Protecting yourself in a sandwich lease isn't usually a problem. 

Given that my unit is sandwiched between two others, could this be a structural issue affecting the whole building?

I am wanting to make sure I will be working with a title company that is familiar with wholesale assignment contracts, seller financing, lease with an option to purchase and possibly sandwich leasees with an option to purchase.

You can even plan vacations that are written off if using the sandwich method by doing work on Friday and Monday for real estate and the weekend is there so you do vacation stuff so all lodging and travel can be written off. 

. ==== Projected Income ====**Off Season**-$4,000/Month Rent Period: September - May (7 Months) Projected Income: $28,000**Summer 1**-$8,000/Week Rent Period: June (4 Weeks)Projected Income: $32,000**Summer 2**-$8,500/WeekRent Period: July-September (12 Weeks) Projected Income: $102,000**Optional** (Basement Apartment)-$2,000/Month -Rent Period: Year Round Projected Income: $24,000TOTAL PROJECTED INCOME: $186,000 ==== Operating Cost ====-Mortgage: $84,000 ($7,000/Month) -Utilities: $36,200Gas $6,000 ($500/Month) Electricity $6,000 ($500/Month) Internet $2,400 ($200/Month) Garbage $5,000 (Estimate) Pool $4,000 ($250/Week)Landscaping: $4,000 -Mowing: $2,400 ($150/Week)  -Clean Ups: $1,600 (Spring & Fall)-Weekly Turnovers: $8,800 ($550/Week)==== Legal Cost ====Summer Rental Fee: $20,100 (15% of $134K)Sandwich Rental Tax: $6,855 (15% of $45,700) NET PROFFIT: $38,845.00

Its like having a jelly sandwich or peanut butter sandwich.

Sandwich LO are even better.First and foremost, NEVER combine the two into one contract as the seller.This topic is a seminar unto its own, in order to fully explain what I wrote above, and to understand the why and how. 

I would just add that the West Eighties neighborhood is bound to experience some appreciation with being sandwiched between the Tremont and Edgewater neighborhoods. 

Get out some bread and make a spam sandwich.