How do I get this deal done

[Andrew Martin]

I have a deal lined up

6 rental properties for $200,000 total.
All are rented and have C/O certificates. Total rent is $3000/month.

The owner will finance with 75k down and hold a 125k note for 10 years at 6%. How do I cash him out before then? And what is the best way to come up with the 75k i currently have 30k to put down.

thanks for the help