Is this passive income idea a good use of my $85,000

[Matthew S.]

I’m new to real estate investing and am learning as much as possible right now. 

Scenario: My brother bought a mobile home house/trailer for $120,000 in 2019. It’s realtor.com estimated value is $160,000 (yes California prices). He owes around $85,000 on the loan. 

My thought to invest: pay off his $85,000 mortgage for him and he will pay me $500 a month (instead of the $906 he currently pays the bank). It’s  a very safe 7% return on my money. 

We would have something in writing and work on the kinks for number when he sells. 

Question: As someone looking to get into real estate investing is this a good use of my money? I’ll have about $200,000 to invest with in total ($85,000 of that would go to this deal).  I still work a full time job with a lot of overtime so in reality I don’t know how much time it will take me to learn all I need before investing. This seems like a quick easy way to make guaranteed passive income. 

Thanks in advance for all the advice.