Be aware of local rental regulations
In many locales, rental properties are treated more like businesses than residences, and while 8×10 might constitute a proper bedroom in your personal home, it likely won’t be considered such for a rental property. In one local township where we presently own three properties, there are minimum ceiling heights (7′) and square footage (100 sq. ft.) for bedrooms, substantially different from what is required for residential homes. Occupancy is calculated by the township based on the square footage of the unit, so what the local realtor touts as a four bedroom home may only legitimately be a two bedroom home if rented.
Township-enforced renovations can be a massive expense; in fact, I personally know someone who paid nearly $50,000 to get two basement bedrooms and a bathroom upgraded to meet this code. He’d bought the house with a “finished basement” which the previous owners had completed without a permit. Because rental properties are treated as businesses, he was not allowed to do the work himself but had to hire an architect to draw and seal the plans, then licensed plumbers, electricians, and building contractors to do the work.
It is a safe assumption that you’ll need to bring your property into accordance with local rental regulations prior to your earning any income from the property. Knowing the issues, you can budget accordingly