The two additional units will be detached from the existing structure so there will be no interruptions from that standpoint.I have agreed to a temporary rent reduction at the tenant's request to compensate for the inconvenience and loss of the backyard during construction. 

@George Goldstein, in addition to what others above have said.

You might find a great deal on a property that comes with an additional Mello Roos tax, and it could still be worth it.

3.Additional Fees: Are there other fees I should consider, such as maintenance coordination, lease renewal fees, or vacancy fees?

Just a few additional words of encouragement.

There is more to the formula on how much you can bring in, assuming you're self-employed.If you're an S-Corp, you can do the 23k as an employEE, then an additional 25% of your salary on top of that, with a maximum of $69k total. 

There are budget-friendly self-management sites that make setting up applications and collecting rent simple and again, you can pocket that 12%.

The costs sound a little low to me if you are talking turn key including permits, site work, utilities, plans, surveys etc.

Many never bother to even get their licenses.A couple additional pros and cons:1.

If you are buying a 2 unit building, especially if you are planning to buy additional investment real estate your best bet is to work directly with the smaller banks/credit unions in your community if that's where you are purchasing or in the area where you plan to buy.