investor payment plan

[Kevin Vasquez]

So i found a property im interested in renting. The cost is $135k. I have a hard money lender for 80% of it so that leaves me in charge of $27k to put down. If I have an investor(s) for the $27k, how will their payment plan work including interest? 

I was thinking on offering 10% on the $27k for 60 months. 

So would it just be simple math ($27k + 10% = $29,700 divide by 60months = $495?)

Thanks!