Multi-family assets are in red hot demand here because the population growth (and percentage of renters) is showing no sign of slowing down anytime soon.

As an academic exercise, put together a spreadsheet listing all the RE investors in this post https://www.biggerpockets.com/forums/55/topics/799... and determine the percentage that have at least one degree versus those without a college education.  

Everything else checked out and I rented to them and everything worked out fine.Definitely check your landlord laws as here we have to either keep it in a non-interest bearing checking account or give the tenant a percentage of the interest if it is held in an interest bearing account.  

I'm new to REI, and can't really answer your question (I think too many variables come into play to give even a ballpark answer, including what tax bracket you are in, what your expenses are, how much you can write off for depreciation, etc.), but on the recommendation of a fellow investor, I read John Reed's book on Aggressive Tax Avoidance for Real Estate Investors, and it has a ton of good information on this.

Is there a maximum percentage one might want to have saved (of course depending on the area and home)?

The percentage paid depends quite a bit on your Federal and State tax bracket. 

You need to be able to properly value variable expenses, as well as quantify asset condition to be successful.

A HUGE percentage when you go to pay down the note will go towards fees and interest.

You should be able to get what you're asking for, if for no other reason than RE agents can set a minimum commission; it doesn't have to be a straight percentage. 

So you can't deduct it all this year, you have to take a percentage and deduct that each year until fully depreciated.