Talk to the city to see what is needed for a suite and then go through the check list.for tenants, I'm not sure I would have rented a basement suite to a family of 7-that's asking for trouble giving the size of the space.

You can't charge two people rent for the same space during the same time.If the departing tenants are paying rent through August 31, then it's their rental until then.Also, you should never let a tenant move things in early.

However, future rights can vary.Key Lease Terms to ReviewTo determine the specifics of your lease, look for the following clauses or terms in the lease agreement:Assignment and Subletting:Check if the lease allows for the assignment or subletting of the tower space to new carriers.Look for language such as "the right to sublease or assign" or any restrictions on adding new tenants.Scope of Lease:Determine whether the lease explicitly states it covers only the equipment and tenants present at the time of the agreement.Phrases like "existing tenants" or "as of the date of this agreement" can be indicators.

Adding dishwashers, adding fenced private yard space.

I would turn this little room into an amenity space, game room, spa, gym, etc.

I am on my second house hack and to be honest, the first one was a much better deal and makes more sense on paper BUT I got exactly what I wanted in terms of spacing, layout, and location for the second so it checked off a different set of boxes. 

For example, in some cities you don’t need to add a parking space for an ADU where you would need to add one for an additional unit.

Here’s the information$800,000 commercial propertyno down payment 30 year contract at 7% percent fixed.Mortgage is$5,700There’s a small vacant space on the back that you can possibly build a mechanic shop bay on and make some additional income maybe about $2,000 a month.On the front of the property their is a small building that has a restaurant and they pay rent $4,000 a month. 

There are actually very few actual insurers in this space (though more than a few years ago).

The yard space could lend to "like an apartment but with room and convenience of privacy".