For double bore I either put a dummy plate over the unused bore or, as someone else mentioned, put a non-locking knob on one of them.I'm a huge fan of the Kwikset Smartlocks on individual unit doors but I prefer the Schlage keypad locks on common doors.

We feel the rental demand will catch back up in a couple years, but there has been lots of overbuilding for student housing.

I also agree with the pp regarding asking property managers what rent they’d estimate for each side, as well as the demand and vacancy rate.  

So I typically go to areas that have strong rental markets where there is a demand for apartments.

I have ask my landlord to replace my carpet since it's been over 10 years since I moved in she has agreed to replace the carpet on several occasions  however stated that  the property owner needs to come and inspect the carpet to make sure that  it is not  above and beyond normal wear and tear it is my understanding that in California the carpet should be replaced after 10 years  it is has bugs in it  there is no padding left  it is filthy grungy and it's already been cleaned twice and no  difference  because I am diabetic if I can have it replace laminate flooring that are being installed and all the  recently vacated units  which are being renovated I asked her on several occasions if I can have laminate floor instead of carpet and she stated that they cannot install laminate flooring in upstairs units due to the noise however I just discovered that the unit adjacent to mine on the upstairs floor  just  was renovated and they installed laminate flooring as this discrimination can I demand  this type of flooring  and ask  her about the new laminate flooring on the second floor policy and why I am unable to  have the same  can I demand that type of flooring or do I have to have carpet  I also feel she is being discriminating against me for no reason  she has been short when I ask for repairs  I asked to move to the downstairs unit and she gave me a whole rant about how she doesn't think that the property owners would allow me to move down there based on my rent being late once or twice  and a bunch of other reasons which I don't think it's her business  to point these things out to me or rather she should just give me the application or instructions on how to go about it and let the property owners make that decision  do I have any basis for discrimination  complaint against her with the fair housing authorities  California

I am now considering partnering up with two other individuals(1/3 each) to invest in multi-family homes.

That being said here’s my 2 cents on your individual expenses.  

AND as long as individual power and water meters.  99.9% chance this is all illegal and only one power meter and one water meter which makes it difficult to rent to 3 different tenants. 

If you are going to start partnerships, I recommend going with individual LLCs.

I know my understanding of investing has been greatly expanded through getting to know the individuals mentioned above.