New Memeber/Investor deal analysis

[Michael Hoss]

I am glad to have found this valuable real estate investing forum, I am novice and willing to learn by reading and following advice from the members who have been in my position. I thank you all.
Searching online, I found this potential deal I need your input on
36 class c multifamily unit all Bill paid property in TX 30 minutes from were I live
According to seller, %93 rented, 2 vacant, 9.1 cap rate asking $790k, from 2012 actual P&L figures are as follows:
$225,193.96 Total Income
$152,705.89 Total Expense includes tax, management and utilities, make ready
$72,488.0. Net income, seller mentioned rent is $30 below market currently between $570 to $600
What should I ask, look for, be careful off,
I am 36 years old, IT freelance consultant, works from home, have $400k to invest for passive income, no debt, wanting to retire 55, please advise Good, fair deal or stay away , what to expect in finding financing, what to offer seller based on numbers, what is the going commercial interest rate for a $350k loan? What is the average loan length, can I manage it myself and free about 30k management expense?
Novice who doesn't want to make a mistake with 10 years of savings.
Thank You