a lot would have to do with whether or not your grandparents estate went through probate; whether your grandparents had a will; whether financial consideration and the amount of consideration was paid for the property by your uncles; any other relatives and who they are; state law for inheritance if your grandparents died intestate, etc.  

Any extra advice on other considerations would be greatly appreciated!

There are fundamental concepts to Sub-to and additional considerations with LT's. 

Additional Considerations:Are there any additional considerations I should keep in mind when targeting young professionals and students for house hacking?

Your 'profit' will come when you own and eventually sell an all TOH park.Here are some additional bullet points that I follow for your consideration.1- The best buyer is the one currently living in the home. 

I would avoid them.Do yourself a favor and watch "Pacific Heights" with Alex Keaton.

The attached images show the attic's current condition.The room in the back is insulated and and would require finished flooring, heat, & paint (62 sqft above 7 ft height). 

I tend to not give out "advice" to non-clients, rather I state facts and opinions, so I'm not sure what "advice" you're talking about here.My advice to my clients absolutely takes into consideration their goals...that's the value I provide.

I have verified with USPS that each triplex address is in their database and that there are no issues with the location and height that I would install it at.

@Ivan CastanonInventory, interest rate decreases, rent adjustment, market reports, and economic indicators are all important considerations when making a successful real estate investment.