Additionally, I get 1 Terabyte cloud storage per user, and if you sync your PC to the cloud, what you enter is automatically synced to the cloud, backing up your data at the same time.

Right now I have quickbooks set up/ learning it and I have OneDrive for storage, but I am still struggling to take the time to reconcile every month.

Can someone give insight on how the 3rd floor could be made into storage so that it will pass inspection as a 4 family?

The tenants in the front one bedroom are asking to use one as a storage as they have a second baby on the way. 

I would first see what interests you in real estate apartment, self storage or so forth.

The other being a complex with 4 units or less and the owner occupies one of the units; the complex has 3 apartments and a garage, and I occupy the garage as a storage unit; my state's laws classify storage units as rental units.I'm not sure how it's fudging any numbers.

Theoretically, if all that has been done, and he doesn't rent you the unit because your brother told him not to, you could sue him in small claims court for the cost of moving your possessions to storage and a hotel room. 

If you will not be using a lender, then you may still want an environmental assessment in certain situations: viz. if there are indications of current/past oil-fired heating plants and the possibility of underground storage tanks (USTs) - either active or abandoned.

Demand, location, positive cash flow whether you are financing it or not, area growth, amenities, repairs, seller motivation, is it in a flood plane  economical pluses or minuses, property age, layout, historical issues, future projections, neighborhood issues, weather issues that are negative or positive, distance from an existing public protection, if provided, storage area, and property taxes. 

When it runs low, depending on the item, I ask the cleaner to stop and give them some from storage.