Bunny, I honestly think your best solution is 2 separate pairs of skates. If you have some old boots that are still decent, put dance blades on them and use them. That's what I did.
My new boots always went to freestyle and the older ones got the dance blades (that was my priority anyway; you could be opposite).
It really wasn't that hard switching back and forth between the two pairs, perhaps because both blades were MK brand. It didn't take me long to adjust for the short blade tail, although I did have a few backwards falls at first!
I agree with this. Because I've done both disciplines for so long, I have dance boots with the dance blades, and then my custom Jackson freestyle boots have my p99s on them.
Good luck!