best technology for launching self-paying smartbonds

We are a startup offering industry-specific HPC cloud computing on demand using 3rd party infrastructure. Now we want to finance building of our own dedicated HPC clusters for providing private and hybrid cloud solutions by issuing self-paying smartbonds that will pay fixed interest/coupon per quarterly basis out of the billed earnings of existing and new clients e.g. 7%p.a. on quarterly basis say 1st of every 3rd calendar month. In addition to the fixed coupon, the smartbonds will pay a variable income earned from the royalties and income generated from 3rd party developers using our HPC Cloud Compute API. The smartbond issuance will be of 1-5 year tenor and will be transferable electronically.
Which is the best crypto protocol to issue such smartbonds? I know about Ethereum but it’s not ready yet and will take about a year or so to mature. Is CryptoNote a viable alternative?
I look forward to hearing from you guys. Any developer having interest in financial apps are welcome to join us.