65 SBD startup and then 45 SBD each additional week for a delegation of 10K SteemPower!

This is absurdly high. Users would be better off simply selling their SBD, buying STEEM, and powering it up themselves. The chances of them recovering that money and making a decent profit for the amount of curating that would be necessary would be pretty slim.

Also, with the end of the experiment coming when HF19 is implemented, lower-SP voting power will likely have far less influence than it does now. Combine that with the elimination of the n^2 algorithm, and users could be taking some fairly large losses by renting at your high prices.

Why not have the user split their curation rewards with you instead? No need to charge them up front, except for an initial deposit that will be refunded after the first week of curating. And you can then pull the delegated power at any time without them losing any money that they pre-paid. Seems like a much fairer system to me.