What are the occupancy limits for unrelated adults in the city this home is located?

Louis area so I am essentially re-learning the city as an adult. 

Learn what is considered illegal discrimination and make sure to steer clear of thatOnce I find an applicant I would like to move forward with, I use my background check service to send them an email link where all adults 18 and over must fill out an online form and pay the $40 service fee.

Louis area so I am essentially re-learning the city as an adult.

I understand they have more tenant turnover, students can be rougher on property than more mature and possibly responsible adults, and that the summer is a high probability vacancy (shorter duration lease) as most STR tenants will want something better than student housing and it would be a pain to furnish/unfurnish for the short out of school year.  

Any advice is helpful and this would be for more kids that have graduated highschool or adults then just my brother and his friends, etc?

With 9 adults living in this house the utility costs are going to be much higher than would be for a typical family.What about lawn care, snow removal and pest control?

Do all the adults who will be living in the house have a combined income that qualifies?

We are all young adults that either are entering the work force as new graduates or are on our last years of college that are eager and see the importance of owning real estate.

Also with the rising cost of homeownership, student debt, and lifestyle many young adults are opting to rent rather than own.