@Emily Gowen so as you pointed out you would not have to do a 1031 exchange on your current home to avoid the capital gains tax and coupled with what Dave Foster pointed out I think, speaking from experience you would have a high likelihood of success. 

Please, please, PLEASE learn how to underwrite an apartment before taking the next step.

I'am now on my 4th year with Jerome but no longer am in the 12 month course. instead last year i joined another private group Jerome offers to students that have been apart of the program for a minimum of one year which is running me $30,000 a year which includes another course that dives in deep mostly with Muti-family apartment complexes, Manufacturing warehouses, Commercial Property and even High Rise skylines for people looking to scale their real estate portfolio to a massive level and attain nine figures.I Hope this helps if you have any specific questions or are thinking about joining the program I don't mind referring you to someone! 

Looking to invest in multifamily apartment complexes>50 units.

Would real estate prices in certain regions rise rapidly due to demand from both local and international buyers? 

, it's still highly unlikely that an appraiser would have given value to this bathroom in any case, so we're not losing anything from an appraised value standpoint.Seller should be more than OK with it once you educate them on the fact that of all the offers they are evaluating, yours is the only one willing and able to execute a plan to close on-time, without delay, in spite of the flagrantly illegal and unpermitted bathroom.

Quote from @Breland Clark: I would like to know more about developing land and subdivisions for new builds and apartment buildings. talk to the land development arms in your city or state.

I am looking to buy a multifamily property that primarily has studio apartments.

I own 32 properties myself and have bought and sold over 300, including a few apartment complexes.

If we're going to just talk in hypotheticals, of course anything is probably possible anywhere but highly unlikely.