Congrats on reaching 10k HP, I hope that will serve you well!
If you don't have the needed Hive when the next level opens up you can still get shares and pay for them later when you do have the funds. I guess I bought myself some time completing both level 28 and 29 because I have been lacking it to do all the work opening and clompleting with new shareholders coming in. Once the account reaches 8525 (98 HP More) Level 30 will become available.

It's going to be really interesting where hive will go but I'm quite sure the upvotes from this project will continue to offer some really good value to those who are actively blogging.