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! 

If i were to purchase a 6 unit apartment for $280K, which fully occupied is roughly $5,050 a month.

You will pay them and everything will then fall apart.

So the seller cannot go get another loan for a car, house, apartment, etc. so it damages their credit by stretching them too thin.Am I missing something? 

Is it better to diversify your portfolio in one geography, tenant base, style of property (SFH, Multifamily, Apartment).

Quote from @Tannia Castro: I would say the key would be to narrow in on an area (this could be a city if you are not from that area and investing remotely), or this could be a part of the city (some local streets) if it is in your backyard.

Take this example and remove the LLC as a part of this conversation for simplicity.

The findings are particularly interesting for those focused on the Columbus, Ohio market, which topped the list for both two-bedroom and three-bedroom rental searches.The report also notes a shift towards more apartment searches, influenced by the scarcity of single-family homes and rising interest rates.

You don't want them to just be financially qualified but you failed to investigate how they treated their past two apartments. 

And, know this:  The #1 reason that Landlords fail is their failure to manage to the lease (source: American Apartment Owner's Assn).